This population pyramid shows a(n) — in the number of males as age
Age
Males
Females

Correct answer is b.

This population pyramid shows a(n) decrease in the number of males as age increases.

Explanation:

We can conclude form the pyramid that only option B is correct.

Obviously, as the year are passing the population of male is dying out.

We see that the largest number of males is among the younger and middle population.