Question

chapter 6 reading question 4
1 part -- of 1 point

when birth rates decline, what happens to a given population?
the average age of the population decreases.
the population shifts toward females.
the average age of the population increases.
the number of producers in the ecosystem decreases.

Explanation:

A declining birth rate means fewer young people are added to the population. Over time, the existing older age groups make up a larger share of the total population, causing the average age to rise. The other options are incorrect: a lower birth rate does not reduce average age, shift the population toward females, or directly affect ecosystem producers.

Answer:

C. The average age of the population increases.