What term refers to both plants and inert materials used to prevent soil erosion?

The term that refers to both plants and inert materials used to prevent soil erosion is known as ground cover. Ground cover plants are specifically cultivated to cover the soil, enhance its stability, and reduce the risk of erosion by providing a protective layer. They help anchor the soil with their root systems while also absorbing water, thereby mitigating the impact of rainfall and surface runoff that can lead to erosion.

Additionally, inert materials, such as mulch, rocks, or geo-textiles, are often used in conjunction with these plants to further stabilize the soil. These materials can complement the vegetation by providing additional coverage and preventing soil displacement, thus enhancing overall erosion control.

In contrast, the other options do not encompass this dual function. Pavement refers to hard surfaces created for pathways and does not address soil stabilization. Twine is a material typically used for binding and does not contribute to soil erosion prevention. Grafting is a horticultural technique for propagating plants and does not relate to erosion control. This clarity on ground cover's role highlights its significance in landscape management and erosion prevention strategies.