What are the links of the problem

 A problem , First, include the questions asked ,
	 For example, a certain problem is about photosynthesis .
 Where the problem lies 
	 The problem of photosynthesis , Always put forward through something , For example, by examining the leaves of a certain plant , This is where the problem lies .
 Why do you ask 
	 Let's examine photosynthesis with this kind of leaf .
	 But why should we examine photosynthesis ？
		 Or to prove a biological theory ,
		 Or to cultivate a new variety ,
	 And this is the real intention of asking questions , That is, why ask .
 Besides , Asking questions also includes a link ：
	 Questioning itself is the behavior of some kind of being, that is, the questioner ,
	 So questioning itself is a way of existence of this kind of being .