At the present time both populations have the same number of individuals in which of these countries will the population growth over the next 20 years place the greatest strain on the enviorment

The diagram shows the current percentage of each population by age and gender (male/female) for two countries. After carefully analyzing the graph I came with the conclusion that:

(1) Country A, the population growth over the next 20 years will place the greatest strain on the environment since the larger percentage of young people could result in rapid population growth.

I hope this helps, Regards.

b is the correct answer