What dose this mean? this phrase, found in darwin's origin of species, suggests that species adapt and change by natural selection and the changes aid in the survival of the organism.
they want the term for it!

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 correct answer is c.