Answer:
The density of a population can be regulated by various factors, including biotic and abiotic factors and population size. Density-dependent regulation can be affected by factors that affect birth and death rates such as competition and predation.
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I believe the correct answer is the second option, or b.
<span>a substance or layer that underlies something, or on which some process occurs, in particular.</span>
C. consumers depends upon producers for food
