Answer:
c.meteoroids
Explanation:
Meteoroid is a piece of a comet or asteroid.
A meteoroid is a piece of matter, like stone or metal, that travels in space. Most meteoroids are no bigger than a pebble. Large meteoroids are believed to come from an asteroid belt. Some of the smaller meteoroids may have come from the Moon or Mars. If a meteoroid falls into Earth's atmosphere, it begins to warm and glow. This is called a meteor.
