How can twins be identical? a. they have the same genetic information. b. they are raised in the same environment. c. they have the same parents. d. they are born at the same time. reset

A,because they have exactly the same genetic information.

Is this a question? i'm confused

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