Answer:
Growth of population is the change in the number of people living in a particular area between two points of time. The rate of the growth of the population is expressed in percentage (%).
Third (III) phase of growth of population:
(i) India?s population entered the third stage of transition sometime in the close of the 1960s.
(ii) This is the period of population explosion in India.
(iii) Decline in the death rates was much more rapid then birth rate, the rate of increase in the population went up from 1.2 to 1.3 per cent during 1921-51 to 2 to 2.2 per cent during 1951 - 81.
(iv) Improvement in the economy results m increase in the standard of living which in turn resulted in the decline of death rate.
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