Question

independent practice
humus is an important part of soil. what is humus?
a. metallic minerals
b. small grains of weathered rock
c. clay minerals
d. the decayed remains of organisms

Explanation:

To determine what humus is, we analyze each option:

• Option A: Metallic minerals are inorganic and not related to humus.
• Option B: Small grains of weathered rock are part of the inorganic soil components (like sand), not humus.
• Option C: Clay minerals are also inorganic soil components, not humus.
• Option D: Humus is formed from the decayed remains of plants, animals, and other organisms, which enriches the soil with organic matter.

Answer:

D. the decayed remains of organisms