Question

which could cause topsoil to be lost? wind and water erosion lack of use compaction desertification

Explanation:

Wind and water erosion directly displace and carry away the top, loose layer of soil (topsoil) through natural forces. Lack of use typically preserves topsoil, compaction reduces soil porosity but does not remove topsoil, and desertification is a broader process that can result from topsoil loss rather than being a direct cause of it.

Answer:

wind and water erosion