I believe the answer to this question is Hamlet :)
1: a state formally cooperating with another for a military or other purpose.
2: combine or unite a resource or commodity with (another) for mutual benefit.
those are two defintions
source of info Goo_gle
Well, I old man will feel happy if he has achamplished everything he ever wanted in life. Hope this helps :p
You can re-arrange your sentence in this way:
In order to identify the development of tornadoes, few required conditions can be described.
