Tall Trees

Solution

4 trees from left to right: tallest, next tallest, smallest, third tallest.

Explanation

4 trees from left to right: tallest, next tallest, smallest, third tallest.

This is the tallest tree.

Amy is in back of it.

This tree is taller than the one hiding Casey.

It does not fit any of the other clues.

Tim is in back of it.

This is the smallest tree.

Jamal is in back of it.

This tree is taller than Jamal's tree.

It is shorter than the one hiding Tim.

Casey is in back of it.