Hurricane Harvey caused a massive amount of flooding that affected many species of terrestrial life. How would a population of terrestrial
animals survive this natural disaster?*

Explanation:

Opinion only here

First one is only an opinion, Some terrestrial animals could certainly avoid a flood, or at least swim out of it if it came too fast.

Second one is probably false as it would normally take many, many, generations for a species to become aquatic.

Third ones starts out solid with the statement about fleeing to higher ground, but then becomes false when the "or perish" option is added. Generally perishing does NOT qualify as survival.

I'd say that the strongest answer is NONE OF THE ABOVE

answer; /// the above statement is (true);