When decomposers break down organic molecules, a crumbly organic material that improves soil quality called is formed. when decomposers break down organic molecules, a crumbly organic material that improves soil quality called is formed.

The correct option is: Humus

Explanation:

Humus is defined as the spongy dark organic matter that is present in soil. It is formed by the decomposition of the dead animal and plant matter by certain organisms called decomposers.

Humus is rich in nutrients and thus improves the quality of the soil. Therefore, these minerals can be absorbed by the plants as nutrients.

let that person have a turn to speak : )