Firstly, homesickness is the one factor. We don't have families over here that is we have to do work by ourselves. At back home most of the time our parents take care of everything our food, clothes, meals of the day, study, work each and everything. we can interact with others openly here. It is very difficult to live without family. Moreover we don't have our own homes here. Secondly, climate is the another factor as in India we have huge and natural source of sunlight that is sun. In Canada, specially in winters it's harsh weather. We can't even imagine to go out without jackets.