Answer:
D. Decomposers are not recycling nutrients for use.
Explanation:
A. There are too many carnivores in the ecosystem.
B. The herbivore population is decreasing.
C. The consumers are absorbing all of the available nutrients.
D. Decomposers are not recycling nutrients for use.
Decomposers in an ecosystem function by decomposing dead organic matters and recycling their nutrients back into the ecosystem This nutrients then become available for other group of organisms (like the producers) to pick up an utilized for their functions.
Option A and B have no significant implication on the amount of nutrient in the ecosystem. Option C is also wrong because consumers only take their nutrient by feeding on producers or other consumers.
The correct option is D.
