Question

which of these is mostly made up of ice? a. comets b. meteors c. asteroids

Explanation:

Comets are often referred to as "dirty snow - balls" and are composed mainly of ice (water ice, along with other frozen substances like carbon - dioxide, ammonia, and methane ice) mixed with dust and small rocky particles. Meteors are small pieces of debris that burn up in Earth's atmosphere and are not primarily ice. Asteroids are rocky and metallic objects in space and do not consist mainly of ice.

Answer:

A. Comets