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The calm, shallow S -causes→ ON waters of coastal estuaries are easily polluted by nutrient-rich sewage.
When estuary waters ON -causes→ A become over- nitrified as a result, algae proliferate.
The abundant algae, A -causes→ FD in turn, sometimes provide a rich food source for microorganisms that are toxic to fish, thereby killing most of the fish in the estuary.
Which one of the following can be properly inferred from the information above?
Fish in an estuary that
The likelihood that fish would die from pollution other than sewage is not discussed in the statements.
2% picked this
In estuary waters that contain
The rate that microorganisms that are not toxic to fish reproduce is not discussed in the statements.
4% picked this
Nutrients and other components of
The statements do imply that sewage harms fish by way of resulting in a proliferation of toxic microorganisms.
3% picked this
Algae will not proliferate in
That algae will proliferate in estuaries polluted by nutrient-rich sewage, does not imply that they will not proliferate in estuaries that are not polluted.
6% picked this
Overnutrifying estuary waters by sewage
Why this is right
This links together S -causes→ FD the causal chain.
Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.
85% picked this
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