What is the main cause of the rapid population growth in India?

The reasons for rapid in India are as below:

(i) High Birth Rate and Low Death Rate: From 1921 to 2001, the death rate has fallen from 42.6 to 8.7 per thousand while the birth rate fell from 49.2 to 26.1 per thousand.
(ii) Poverty: Poor people have to spend little on the upbringing of their offsprings. Besides, the children supplement the family income.
(iii) Child Marriage: Early marriage is a common feature in India. About 90 percent of girls is married in the age group of 15-20 years.
(iv) The low status of women: In India women have a low social status. They are treated merely as child producing machines.
(v) Illiteracy: Rate of illiteracy of 35 percent is pretty high in India. Illiterate persons fail to understand the significance of family planning.