JAMB - Geography (2017 - No. 1)
A simple measure of the number of dependants that each 100 people in the productive years must support is
agricultural density
dependency ratio
employment ratio
population density
Объяснение
All other options are wrong because according to the answers provided, only dependency ratio has to do with dependents
dependency ratio is a measure of the portion of a population composed of dependents(people too young or too old to work)
dependency ratio is a measure of the portion of a population composed of dependents(people too young or too old to work)