Simple mathematics. If there are more births than deaths, the population will increase. If the reverse is true, the population decreases.
the answer is by comparing birthrates and death rates
Population decreases
This transition is known as the demographic transition, which typically occurs as a society advances economically and socially. Factors such as improved healthcare, education, and access to family planning contribute to declining birth and death rates. This shift leads to changes in population structure and can impact a country's social and economic development.
demographic transition
Birthrates , death rates, women and male intercourse
because birth rates and death rates relate to population. the birth rate shows how much a population is increasing, and death rates show how much a population is decreasing. when you average the two out, it will give you the population(:
For the past century the birthrates in human culture have far out numbered the death rates which is why our world population has been steadily growing. People are living longer than they did in our past.
The ice in the box
When death rates lowered but birthrates stayed high, the population skyrocketed.
If birth rates exceed death rates, the population increases proportionally. If death rates exceed birth rates, the population decreases.
Birth and death rates determine whether a population is growing, shrinking, or staying constant. If more people are being born than dying, then it is growing. If more are dying than being born, then the population is shrinking.
Birthrates , death rates, women and male intercourse