Which is the result of zero population growth?

a. population stability***
b. no natural increase
c. a rapid decline in human population
d. the elimination of high-density populations

The result of zero population growth is population stability (option a).

Zero population growth occurs when the number of births equals the number of deaths in a population, resulting in no net increase or decrease. This means that the population remains stable over time.

To arrive at this answer, you can eliminate options that do not align with zero population growth.

Option b, "no natural increase," is incorrect because zero population growth still allows for births to occur—it simply balances births with deaths.

Option c, "a rapid decline in human population," is also incorrect because zero population growth implies a sustained stabilization rather than a rapid decline.

Option d, "the elimination of high-density populations," is unrelated to zero population growth, as it refers to a different concept altogether.

Therefore, the correct answer is a. population stability.

Correct.