Which of the following contributes to the development of proton gradient within the thylakoid membrane?

Where is the picture at

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

C) they are specialized meaning they are designed to do different things