Biology · Man and His Environment

Moderate grazing refers to controlled or balanced grazing practices where the number of livestock and their grazing duration are managed in a sustainable manner. It involves maintaining a healthy vegetation cover and avoiding overgrazing. This practice can actually be beneficial for the soil and ecosystem as it helps in maintaining biodiversity, nutrient cycling, and organic matter accumulation.

This answer does not make sense in the context of soil erosion. "Carolers forming" seems to be unrelated to soil erosion and is likely an incorrect option provided.

Extensive ploughing involves the frequent and extensive use of ploughs to prepare soil for cultivation. This can lead to increased soil erosion as it exposes the soil to the erosive forces of wind and water, especially on sloping lands.

Moderate grazing refers to controlled or balanced grazing practices where the number of livestock and their grazing duration are managed in a sustainable manner. It involves maintaining a healthy vegetation cover and avoiding overgrazing. This practice can actually be beneficial for the soil and ecosystem as it helps in maintaining biodiversity, nutrient cycling, and organic matter accumulation.

Heavy grazing refers to excessive or uncontrolled grazing where the number of livestock is more than the carrying capacity of the land. This can lead to overgrazing, removal of vegetation cover, and soil compaction, which contribute to soil erosion.