What are the four main parts of soil?

inorganic minerals, organic matter, water, and air.

Explanation:

inorganic mineral matter, about 40 to 45 percent of the soil volume.organic matter, about 5 percent of the soil volume.water, about 25 percent of the soil volume.air, about 25 percent of the soil volume.

It is c. naturally in the environment

Answer collision and mountain formation;