Look at the images below and order them from smallest to largest, using 1 for the smallest unit and 3 for the largest
Plant Cell
Atom
Molecule

Hey :)

3- plant cell
2- molecule
1- atom

Hope this helps :)

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

Bis the answerhope it