height of both trees. number of leaves on the trees. size of the root systems of the trees. shape of the leaves.
I gave my students this multiple choice question: The BEST way to tell the DIFFERENCE between an oak and a maple tree is to compare the

Only one answer is correct among these 4 choices:
- height of both trees.
- number of leaves on the trees.
- size of the root systems of the trees.
- shape of the leaves.

Could you tell me which one is correct?

shape of the leaves.