Which factor helps determined the fertility rate of a group of people?

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 would be d. pili

Than y you put it in    biology

Yes yes yes very good