Have you noticed, trees without leaves look beautiful! I was going to Vaidhehi Falls in Coimbatore (which btw has been closed for public since two years, because of roaming elephants it seems), when I saw a number of such trees standing alone. Since it was a good sight for clicks, I took some photos which I have published below.
When I was searching in Google for why trees shed leaves, I got all sort of reasons – Conserve energy, hibernation, stop manufacturing food, lack of sunlight, lack of water, aging of leaves, summer, winter, etc. I am not sure which are all the truth, but you see the photos below