Okay, so here it is.

At school my class is doing a assignment on the "Renaissance" what we have to basically do is choose a topic, and give a oral presentation (15 Minutes) and teach the class something.

The topic I chose is Art, and what I'm focusing on is Leonardo Da Vinci, and MichelAngelo.

Now here comes the problem, what I need to know is.

What significance did Art basically have during the Renaissance?
And how can I compare it now (modern).
And if Art didn't exist, would it effect anything today?

Help appreciated. Thanks.