Answer:
Well, to start out, stars are reayling just huge balls of exploding gas. Constant fusion is always taking place benith their surfaces (not that they really have a solid surface). Stars tend to get bigger as they age, and darker two. Younger stars would ussually be smaller and more yellow than an older one. Older ones are bigger and have more of a redish color.
Answer: Sedimentary rocks make up 75 percent of the rocks at the earth's surface but only 5 percent of the outer 10 miles of the earth. Sediment, as distinguished from sedimentary rock, is a collective name for loose, solid particles and is generally derived from weathering and erosion of preexisting rock.
I would put option A.
The question says how the surface MIGHT change over a long period of time so that's why I wouldn't say option C, and that's how canyons are formed if I'm not mistaken.
I hope this helps. My apologies if I'm wrong.
