Q: What does the color of soil indicate?


Read this paragraph and choose the correct option from the provided answers:

The color of soil indicates its fertility. Black or dark brown soils are rich in nitrogen and contain a high percentage of organic materials. Soils that are nitrogen poor and low in organic material might be gray, yellow, or red ( Figure below ). Soil with low organic material is not good for growing plants.

 Choices:

- temperature

- chemical makeup

- density

- fertility


A:
fertility