In which type of population is the child dependency share likely to be high?

Correct answer: Population with high birth rate

Child dependency refers to the pressure created by children who generally need support from the working-age population. When births are frequent and the birth rate is high, the number and share of children usually become large. This can increase the need for schools, vaccination, nutrition, health care, and family support. The exact dependency share also depends on mortality, migration, and the age distribution, but high fertility strongly tends to produce a high child share.

Option A is therefore the best answer. A population with very low fertility is more likely to have fewer children, while an elderly-only or zero-birth population would not represent the usual situation created by high child dependency. The question asks which population is likely to have many child dependents, and high birth rates directly increase the number of young people entering the population. Consequently, the child dependency share is likely to be higher.