Answer:
(i) Rapid decline in death rate including maternal mortality rate and infant mortality rate due to control of diseases, better health care measures, better sanitation and community health schemes etc.
(ii) Increase in average life span and increase in number of people in reproductive age.
(iii) Increased agricultural production due to machanization of agriculture, use of hybrid, disease free and high-yielding varieties of seeds, use of fertilizers and pesticides, etc.
(iv) Better storage facilities and transport, facilities.
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