What is mostly made up of ice?
a- meteors
b- asteroids
or
c- comets

Comets

Explanation: Comets are made mostly up of rock. A comet is like a giant dirty snowball, the size of a town or city. It is made up of ice, dust, and small pieces of rock. As a comet gets closer to the sun, it starts to melt and it becomes surrounded by a lot of gas and dust.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)