Which of the following represents an "ecosystem service" performed by soil organisms? A. maintaining soil fertility by decaying and cycling organic material B. providing minerals by assisting in weathering C. altering topography by amplifying erosion D. preserving toxic materials by situating toxins into encapsulated structures E. contributing to desertification by removing excess moisture from the soil

A. maintaining soil fertility by decaying and cycling organic material.

Explanation:

Weathering is not an ecosystem service exclusive to soil organisms. They can't alter topography of the ecosystem. Only way they are servicing ecosystem is by maintaining soil fertility by decaying and cycling organic material.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.