Which of the following best describes cover crops?

Cover crops are specifically grown to enhance soil health, manage soil erosion, and improve nutrient cycling. These plants play a crucial role in sustainable agriculture by providing ground cover that protects the soil from erosion caused by wind and water. Additionally, they contribute organic matter to the soil through root growth and decomposition, which can improve soil structure, water retention, and microbial activity.

By planting cover crops during off-seasons or between main crops, farmers can also suppress weeds, reduce the risk of pests and diseases, and enhance soil fertility mainly through nitrogen fixation in the case of legumes. Therefore, their primary function is not for decoration or solely for animal feed, but rather for agronomic benefits that support long-term agricultural productivity and environmental health.

This focus on the multiple environmental and agronomic benefits of cover crops distinguishes them significantly from the other options presented, which either mischaracterize their purpose or fail to acknowledge their benefits.