but the question was, what causes this change. Whats the reason for it to change. Does Buddhism explain that ? if it does, do tell.
well as far as i know....reason for change is the nature of human and all other living and other things which are not alive....we cant exactly show what and why is the changing for....as we cant define it without reasoning all acts happns in a time line and in a mind...main reason for the change in human nature is the feelings and thoughts which dosent have a meaning of the same at two moments...there are some things which explains the behaviour...in buddhism atalodahama is one thing which explains the nature of changing,,,,and for the second level it is niyama dharma,,,,change in the time line coused by these...changing the whole idea which buddhism is telling us to understand with our insight,,,its just a cycle as long as ya in it you will always feel the change...
btw...this is the rough idea i have in ma mind....if some have any statics n sources feel free to share..and correct me if am wrong,,,,!!