Correct Answer – c
(C ) Two primary factor for the increase in human population are :
(i) Decrease in death rate, particularly matemal mortalty rate (MMR) and infant mortality are (MR) and (ii) Increase in longevity.

Correct Answer – B
If there is an increase in infant mortality rate (IMR) and decrease in maternal mortality rate (MMR), mothers are available to give birth to infants but the infants survival rate is low, which will ultimately hinder the growth rate of that particular population.

Correct Answer – c

Correct Answer – C
IMR (Infant Mortility Rat) and MMR (Meternal Mortility Rate) both are resonsible for affecting the grwoth rate inversely. It means decline in as well MMR will result in high population growth and vice-versa.
Here, If IMR has been increased than it will result in decline in growth rate. While, decreases MMR will cause rapid increases in growth rate.
Therefore, in the above situation, if IMR has been increases and MMR has been decreases in a population, it will not cause any significant change in growth rate.

Correct Answer – C

Correct Answer – c