Question

1) D. Explanation: If the birth rate is larger than the death rate, then the population will grow (as long as it is not affected by immigration or emigration). If the death rate is larger than the birth rate, then the population will shrink (as long as it is not affected by immigration or emigration).
2) C. Explanation: Death and emigration are the common ways in which the population will decrease.
3) B
4) A

Answer 1

Explanation (For B): Death and emigration are the common ways in which population will decrease. Birth and immigration are the common ways in which population will increase.