Did trilobites and dinosaurs live at the same time? What is your evidence?

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

The answer is b, as with an inference you make a statement with no evidence

Other organisms can change their behavior to take the place of the plants in the ecosystem.