My next question was, so why exactly do trees lose their leaves anyway? I'm sure I learned it in like 4th grade, but I was thinking about it again today. As the days get shorter, the trees are no longer getting the same amount of energy from the sun as they do in the Spring and Summer. So in order for the whole tree to survive, it cuts off nutrients from the leaves and stores those nutrients and energy in its trunk and branches. The leaves must fall in order for the whole of the tree to survive. (Interesting that they are called LEAVES, because that's what they do; leave the tree).
The beautiful thing is, the tree stores its energy so IT doesn't die, so that it can bring forth leaves again in the Spring. The leaves make a sacrifice for the tree, and essentially mankind. If the leaves refused to fall, the trees wouldn't have enough energy to sustain them, and therefore die. If all deciduous trees died, there wouldn't be enough energy and oxygen to keep us all alive. What a beautiful process huh! It makes me wonder how much I'm willing to sacrifice in order for something else bigger and better to stay alive. It also adds support to what I already knew: that when I fall, there are better days ahead, there is hope to be born again in the Spring.