RE DO

First, I use the gradient color to do the background.
Then I draw the land on below by using the pen tool and add some gradient.
After that, I draw the trunk using pen tool.
After the trunk, I draw a sun on the sky. Use the gradient(radial) to fill in the color for the sun.
Last, of course is the leaves. I use brush tool to draw it.

Complete!!!!!^^XD

lecturer said my previous work...too childish..
i try to do this , and i use brush to make it more real
i use the ideal to show HOT and tree in a big land...
tree getting lesser and lesser and our sky become red and red and almost orange color,
show that hot temperature....