Q. The permanent decrease in population number occurs due to
A) Migration
B) Natality
C) Emigration
D) Mortality
Explanation
Mortality is the death rate per thousand individuals per year. Mortality rate decreases population size and population density.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.