What is the variety of leaves in plants?

The leaves of the trees are different. If you look at two different types of tree, the leaves will be different. The structure and structure of their cells are practically the same. But the differences are related to the adaptation of the tree. Some trees need more light and have wide and large leaves. Others grow in arid places. Their leaves are small. This is to reduce the amount of evaporated water. Some leaves trap air for better pollination of flowers. Sometimes the differences are associated with additional substances needed for life.