How does the moon reflect light?
Also asked, how does the moon reflect light if it is a rock?
Light hits the surface of the rock, and is then reflected in all directions. Some of that hits the back of your eye, making the image you can see. Instead, rocks looks like the middle case, meaning that they reflect light. And so does the moon.
Just so, does the moon reflect or absorb light?
These different "faces" are called phases and they are the result of the way the Sun lights the Moon's surface as the Moon orbits Earth. The Moon can only be seen as a result of the Sun's light reflecting off it. It does not produce any light of its own.
The surface curvature of the moon reflects 99,9996% of the sunlight not absorbed, into different directions other than your location. Lots of other frequencies of radiation is reflected by the moon soil, but the visible range (narrow range among all the radiation) is what we see.