Which question is true about food chains A. All food chains start with consumers B. The arrow shows the movement of energy C. The arrow shows which animals are herbívores D. The arrow show which animal eat meat

B- The arrow shows the movement of energy

The answer is B, energy is transferred throughout the food chain, hence the arrows.

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