Question

which of the following is round, orbits the sun and has cleared out the region of the solar system along its orb a. sun b. astronomical unit c. planet d. moon

Explanation:

• Option A: The sun is a star, not an object that orbits the sun.
• Option B: An astronomical unit is a unit of measurement, not a celestial body.
• Option C: A planet is round, orbits the sun, and has cleared out the region of the solar system along its orbit.
• Option D: A moon orbits a planet, not the sun.

Answer:

C. planet