What is the difference between contribute and helping?
Contribute means that you give towards something, you don’t do it all. It could be money/food or efforts (work) that you give put you are only part of the help that is being received.
Help is a general term for anything that you do for somebody else.
همکاری یعنی بخشی از کار رو مشارکت دارید.
معمولا کمک یعنی برای یه نفر کاملا کاری انجام بدید ( یا حتی یه گروه)