A meteoroid is likely a chipped-off piece ofGroup of answer choicesa comet.a moon.an asteroid.a planet.

Understanding Meteoroids

1. Definition of a Meteoroid: A meteoroid is a small rocky or metallic body in outer space. Meteoroids are significantly smaller than asteroids.

2. Origins of Meteoroids: Meteoroids can originate from different celestial bodies. The question asks about the most likely source of meteoroids from the given options.

Analyzing the Options

1. A comet: Comets are made of ice, dust, and rocky material. When they approach the sun, they may shed particles, which can become meteoroids.

2. A moon: Moons can also break apart and create debris, but they are less commonly associated with the formation of meteoroids.

3. An asteroid: Asteroids are rocky bodies that can chip off and produce meteoroids through collisions or other processes in space.

4. A planet: While planetary processes can produce debris, meteoroids are not typically associated with being fragments of planets.

Conclusion

Based on the analysis, the correct answer is: "an asteroid." Meteoroids are most commonly regarded as fragments from asteroids due to processes such as collisions.