Question

how does solid rock become soil?
it falls apart and combines with particles in the air.
it splits apart and combines with plant roots.
it breaks down and combines with water, air, and organic matter.
it breaks down and changes into liquid.

Explanation:

Soil formation from rock involves weathering (breaking down rock) and the addition of organic matter, water, and air. The option "It breaks down and combines with water, air, and organic matter" accurately describes this process. Other options are incorrect: combining with air particles is not how soil forms, combining with plant roots is not the main process, and rock doesn't turn to liquid to form soil.

Answer:

The correct option is: It breaks down and combines with water, air, and organic matter.