Which of the following prevents nutrient-rich topsoil from being eroded by wind and rain? bacteria, plant roots, stones, or fences

The answer is plants root

Plants get their daily nutrition from the soil and they use their roots in order to get it.

the plants' root will grow to the nutrient rich area of the soil and make it's composition stronger , making it harder to be blown away by the wind

To check their medical records to see if they have had chicken pox before, if they haven’t, monitor their temperature, drink plenty of fluids, and stay away from small children and those who haven’t been exposed to chicken pox during the incubation period.