Some visitors to the park engage in practices that seriously harm the animals.
Evidence
Some visitors engage in Some people do thing practices that seriously that causes X. harm the animals.
No one who knew that knew X → wouldn't these practices seriously do thing harm the animals would engage in them.
Conclusion
Some visitors don't know Some people these practices seriously don't know X harm the animals.
Evaluate
At its bare bones, this argument is just a contrapositive argument.
P1: If knew harm → wouldn't engage P2: Some people do engage. C: Some people do not know harm.
The correct answer may or may not maintain the "no one who knows X would do Y" type vibe to the conversation. Sometimes they drop the extra colors to the conversation and just mimic the contrapositive aspect.
Goal
Initially just make sure that an argument has a conditional premise, a premise that establishes the outcome isn't happening, and a conclusion that says the trigger isn't happening.
If more than one contender remains, get more nuanced with similarities.