Please answer like a middle school

Thx in advance :)

"spheres" is the name of the four subsytem

Topographic maps are used to measure a-composition b-movement c-elevation d-texture

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.