How do increased global temperatures affect the red squirrel’s food supply? A. Less food is available earlier in the year
B. More food is available in the year
C. Storing food for hibernation is not needed
D. The food supply will remain constant

Where are they though?

C. gemstones they are the only non metallic mineral from the list.

It would be a rusting car, for sure 

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