The major components of population growth are:

• Birth rate is the number of live births per thousand persons in a year. It is a major component of growth because in India, birth rates have always been larger than death rates.
• Death rate is the number of deaths per thousand persons in a year. The main cause of the rate of growth of the population has been the rapid decline in death rates.
• Migration is the movement of people across regions and territories. Migration can be internal or international.