Some countries in africa have a negative human population growth. this is most likely due to
high total fertility rates
high mortality rates from aids
exceeding the replacement-level fertility
reductions in infant mortality

Ans. High mortality rates from AIDS.

Mortality rate is defined as the measure of total deaths in a population of particular region, with respect to size of that population, per unit of time. It plays a negative impact on human population growth.

In many parts of Africa, AIDS (acquired immunodeficiency syndrome) is a serious health concern as it has lowered life expectancy of people and raised several deaths.

Thus, the correct option to be filled in the blank is 'high mortality rates from AIDS.'

d. the weight of the book