Reading ComprehensionDifficulty: Hard

PT147 S3 P1 Q5 Explanation

The Importance of Fire Management

A free, expert breakdown of this official LSAT Reading Comprehension question.

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Passage

In the last half-century, firefighters in North America have developed a powerful system for fighting wildfires using modern technology. But at the same time, foresters and ecologists are increasingly aware that too much firefighting can be worse than none at all. Over the millennia, many forest ecosystems have evolved in such a interval between fires could be as short as 5 years and rarely extended beyond 25 years.

If fires are kept out of forests, however, deadwood and other fuels build up; then, when fire is sparked by lightning or some other cause, what results is a fire so large that it leaves total devastation. Such fires often kill off wildlife that might escape low-intensity fires, and they also reach eliminate fires; land management policies should recognize the essential role that fire plays in many ecosystems.

Fire behavior depends on the complex interaction of three factors—topography, weather, and fuel—and since topography is fixed and weather is unpredictable, fuel is the only element that land managers can control. Land managers should therefore focus their efforts on fuel. A new kind of wildfire management that is designed to simulate the needed. When wildfires inevitably occur, they will be more easily controlled and do much less damage.

What this question is testing

Inference

Topic

The author is walking through a counterintuitive idea about wildfires: trying to put out every fire actually makes the next one much worse.

Framework

Problem/Solution. The author isn't arguing against an opponent — they're explaining how a new way of thinking about fire emerged and what to do about it.

Main Point

Here's the simpler version: forests like ponderosa evolved alongside small, regular fires. When humans got really good at suppressing every fire, fuel started piling up — so now any fire that does start is huge and devastating. The fix is to stop trying to eliminate fire and start managing it: thin out small trees, set controlled burns, and let some natural fires burn when conditions are safe. Then future wildfires stay small and manageable.

P1: Why suppression backfires

Modern firefighting is impressive, but ecologists noticed something strange: forests that used to burn every 5–25 years actually depended on those small fires. The little fires cleared brush, kept big trees healthy, and prevented huge fires later. Take the small fires away, and the forest is no longer in its natural balance.

P2: The buildup creates monsters

If you successfully prevent fires for fifty years, you don't end up with a forest free of fire — you end up with a forest stuffed with fuel. When something finally sparks, the fire is so intense it kills the trees, the wildlife, even the soil. The author lands the main point here: stop trying to eliminate fire; manage it instead.

P3: How to manage it

Three things drive how a fire behaves — topography, weather, and fuel — and the only one humans can control is fuel. So the strategy is: harvest smaller trees, set intentional burns, and let some lightning fires run when it's safe. Maintenance burns every 15–20 years keep the system in balance. Future fires still happen, but they're much smaller and easier to handle.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
5.

The passage provides the most support for inferring that which one of the following is true of

Answer choices

  1. Unsupported Comparison2% picked this

    Ponderosas that thrived in these forests probably differed genetically from modern ponderosas in subtle,

    Genetic differences are not discussed in the passage.

  2. Correct70% picked this

    The population density of trees in these forests was generally lower than it is in

    Why this is right

    This is supported in the third paragraph.

    Skill tested: Inference · how this choice captures the passage's function is the move to repeat next time.

  3. Unsupported Comparison2% picked this

    Weather patterns in these forests were substantially different from weather patterns in

    Weather patterns are discussed but are only described as unpredictable in the context of factors that contribute to fire behavior.

  4. Unsupported Comparison4% picked this

    The diversity of plant species was greater in these forests than it is in

    Plant diversity is not discussed in the passage.

  5. Contradiction22% picked this

    In addition to clearing out excess fuel, periodic low-intensity fires helped to control wildlife populations

    Wildlife had a greater chance of escaping low-intensity fires found in ancient ponderosa forests than it does today (second paragraph).

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