The soil of the temperate forest is often rich in humus. Which statement best explains the presence of humus in the temperate forest?

A. Humus forms from fallen leaves, dead wood, and other dead organic matter.

Option are the following;

A. Humus forms from fallen leaves, dead wood, and other dead organic matter.

B. Tree roots break rocks into humus as they grow.

C. Cold winter weather preserves humus in the soil.

D. Dry conditions allow humus to form

Explanation:

Humus is a type of organic matter which is formed due to the decomposition of plant parts and leaves by the action of decomposers such as bacteria and fungi. The soil of the temperate forest is often rich in humus because when the leaves falls from the trees when get older, these leaves mixes with the soil and due to the action of microorganisms such as bacteria and fungi. These microbes feed on these leaves and releases nitrogenous material which is used by the plants for making amino acid and enzymes etc.