Which line from the poem best indicates that the speaker is ready to relinquish ownership of the desk?

The correct answer would be b

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

Of the cold they can survive in the cold