A cow born in Russia has two tails. Which of the following most likely was the cause of this abnormality?

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

Because some people pollute water ans waste it