Question

Why trees shed their leaves in autumn season i need a relevant reason and nthing

Answer 1

They shed their leaves in autumn season because they need to conserve water as leaves perform transpiration which leads to loss of water. They do this in autumn season only and not in winter or other seasons as they don't do much transpiration at that time as there is not much heat.

Answer 2

Autumn is the time for trees to get prepared for the summer. Leaves act as high functioning engines in a tree and they provide energy and food support to the trees. The old leaves those lasted for a year have lesser efficiency or got damaged due to several reasons. So the trees change their engines or say leaves once a year to make their life-cycles smooth. As the summer is very hard time due to less water, high temperature and wind storm, trees prepare themselves for that. Evaporation of water from leaf surface is important during summer and old leaves may have jammed pores and for that trees renew their leaves in Autumn.