Answer:
the answer is C, environmental awareness doesn't affect
Step-by-step explanation:
From the given choices the appropriate answer is C, environmental awareness, because, the others could all lead to a decline in population
A. Decrease in child birth has direct effect on decline
B. an increase in death also jas direct effect on decline of population
D. government policies also play great role in decrease of population, for example, If the government limits the capacity of each family's to give birth, the population will decrease