I would say <u>Earth</u> because it can be rocky, it has mountains and valley, and of course, the Earth has a crust. And, it revolves around the Sun. Moon, may be rocky, but it doesn't have mountains or valleys. And it doesn't revolve around another body in the solar system. And of course, we all know the sun isn't rocky, and it doesn't have mountains or valleys. That's why my answer is <u>C. Earth</u>.
