Question

Which of the following is composed mostly of ice?


Asteroids


Gaseous planets


Comets


Meteorites


Stars

Answer 1

Answer: The answer is C- comets!                                                                            

Explanation:  Callisto is composed mainly of rock and water ice, although other ices like ammonia ice and carbon dioxide ice may be present. Water ice occurs at the surface of Callisto so it would be comets.