what is the main function of cellulose in plants? A. provide physical support B. Convert sunlight into carbohydrates C. Capture water and sunlight D. provide water and oxygen

The answer is c) tons

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

Because the carnivores keep the herbivore population in check