Which of the following is NOT a way to increase energy efficiency? a. putting insulation in your home c. using public transportation
b. recycling
d. using low heat lightbulbs

this is for earth science.

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