Question

NCERT VIII - Geography

The world population has grown very rapidly. Why?

Answer 1

The reason of rapid growth of population is that the  death rate has gone down due to the growth of the food supplies and improvement in medical facilities. so the number of deaths are reducing and number of births are fairly high . 

Answer 2

the reason for growing population rapidly is birth and death rate.
the birth rate is increasing because literacy rate.
the death rate decreasing because medical facilities