Answer:
Moon - A) An astronomical body that orbits around a planet
Planet - D) An astronomical body that orbits around a star
Solar system - B) A collection of planets and their moons in orbit around a central star
Comet - C) A celestial object consisting of a nucleus of ice and a stream of gas and dust
Explanation:
Solar system contains one star-the sun and eight planets and their moons, asteroids, comets etc. These objects revolve about the sun.
Planet is a round astronomical body which revolves around a star in a orbit.
Moon is an astronomical body that orbits a planet.
Comet is a celestial object composed of ice, dust, rocks and frozen gases. It also orbits the star and is found in the outskirts of the solar system
