Where grazing occurs in a grassland biome, we would expect:
that annual precipitation would increase. that invasive species would proliferate and erosion would occur. erosion of the topsoil. that invasive species may proliferate.
In a grassland biome where grazing occurs, we would expect:
Grazing can lead to the overconsumption of native grasses, which can weaken the ecosystem and create opportunities for invasive species to take hold. Additionally, the removal of vegetation can lead to soil erosion, particularly of the topsoil, as there are fewer roots to hold the soil in place.
While invasive species may proliferate, the other options regarding increased annual precipitation are not typically a direct consequence of grazing.