Let's think step by step! Nitrogen depletion is a condition of some:
Options:
- (A) bushes
- (B) humans
- (C) animals
- (D) soils
- (E) disease
- (F) legumes
- (G) mammals
- (H) Birds
The thinking starts now:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Soil can be depleted of nutrients. An important nutrient commonly added to soil is nitrogen. Soil can be depleted of nitrogen. The final answer: (D).