What is an effect of the overgrazing of grasslands?

Erosion, death, loss of plant species, and food shortage

Explanation:

Erosion - without plants, the soil is uncovered and can easily be blown or washed away.

Food Shortage - the soil has lost it's nutrients and isn't suited to grow plants in. Basically, the plot of land has lost its purpose for growing crops.

Death - Food shortage leads to death for both the livestock and people

Loss of plant species - If the native plants are eaten, foreign plants that adapt more quickly will dominate and eventually, the native plant species will be gone.

These are a few of the effects. Hope this helps! :)