God Made Trees, Why?

In the Bible there are a lot of trees. In the Garden of Eden where God created man and the animals, but before he did that, he created some fine trees. Why did God create trees? Why did he do so with the bark, the branches, the leaves and the fruit all so different? Why did he not do it all of the same kind? Trees sway in the wind, and sometimes, storms and hail have come down on the trees. How did God work out the flexibility of trees? When the seasons come and go, the trees will still be there. Man, in all his wisdom, has forgotten the tree.