What does national identity mean

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Which of the following statements about wearher along mountain ranges is correct