Need help ASAP please please

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it

Ais the

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.