He who is afraid of the leaves must not go into the forest.

Well a forest is filled with leaves (the leaves on the trees) so you shouldn't go in but why would someone be scared of leaves!?

If he is afraid of leaves, he shouldn't go into the forest because leaves fall from trees to the ground, which would make it impossible for him to walk through the forest.

A: become a alien but sound like a human

Yeah where are the statements that we're suppose to give an answer to