The density of population is decreased by the processes -
(A) Natality
(B) Emigration
(C) Mortality
(D) Immigration
Choose the most appropriate combination from the options given below.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B) and (C) only
Population density changes through four basic processes. Two add individuals and two remove them.
(A) Natality — Increases density. Births add individuals to the population.
(B) Emigration — Decreases density. Individuals leave the habitat for elsewhere.
(C) Mortality — Decreases density. Deaths remove individuals.
(D) Immigration — Increases density. Individuals of the same species come in from elsewhere.
NCERT Extract:
Population Growth –
