Helmet concluded that almost none of the weight of the tree came from dry soil, so almost all of the weight of the plants comes from water. Is his conclusion justified by the findings from his experiment?

I’m going to go with 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

The hawk receives 0.1% energy from the caterpillar although the caterpillar gets eaten by another bird smaller than the hawk first