Q: Elaborate section 7 of evidence act, 1872 ?

Ans: Section 7 of evidence act tells that any fact which is any act that can be perceived with senses can become the occasion, cause or effect of crime and hence it will be considered relevant for evidence. 

In clause a, the question is whether A robbed B. If B shows his money to someone before robbery when he was in fair, this fact can be the occasion,  cause or effect of the robbery and hence it will be relevant for fact.