Afarmer clears an area of land, and erosion washes away much of the topsoil. the farmer hopes to repair the damage and restore fertility to the soil with fertilizers. which of the following is a reason why this might not work?
a. fertilizers contain trace minerals that may be dangerous to the soil.
b. fertilizers prevent bacteria from aerating the soil.
c. fertilizers will break down the organic matter that decomposes and releases nutrients.
d. there are just some substances in topsoil that fertilizers cannot provide.

The answer will be d

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.