What is the concept of a universe? how is it different from a "multiverse"?

A universe is not a group of multiple universes.

Explanation:

The universe is defined as the whole constitute of space-time, in which are confined physics laws and all matter and energy. It is known that the universe is homogeneous and isotropic at big scale.

Multiverse is an hypothesis of a group of universes that share the same conditions.                                                                                                      

the answer is a. at the equator

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.