The soil absorbs sunlight. Water filters through the soil. Organic matter is decayed in the soil. The soil is exposed to air.
I gave my students this multiple choice question: How do the nutrients necessary for plant growth get into the soil?

Only one answer is correct among these 4 choices:
- The soil absorbs sunlight.
- Water filters through the soil.
- Organic matter is decayed in the soil.
- The soil is exposed to air.

Could you tell me which one is correct?

Organic matter is decayed in the soil.