Elk herds in Yellowstone National Park are herbivores that eat on the available vegetation. Which factor is important to ensure the stability in this ecosystem?
2 answers:
C) The presence of predators, such as grey wolves, to keep the elk population in check
Answer: Presence of predators.
Explanation: predators such as hyenas or wolves would keep the here at a particular level so that they don't exhaust the primary producers which is the grass.
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