Leaves appear green because the green portion of the light that strikes them is
a. changed to heat
c. destroyed
b. absorbed
d. reflected

D. Reflected
Whatever color your eye sees is the reflected light. So white, all colors reflected and black, all colors absorbed

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

Everything that you need in a lab is in your lab