Question

explain the three main processes of population change...

Answer 1

Answer:

Population change means the change in the number of individuals living a particular geographical territory.

Explanation:

There are three main processes of population change:

1. Birth Rate- This is directly proportional to the fertility rate of society and the medical advancement that ensures that infants survive. The more the number of births in an area, the greater the rise in population.
2. Death Rate- This is directly proportional to advancements in medical sciences that ensure a healthy and long life. Deaths in an area reduce the population.
3. Migration- It is described when one chunk of the population moves from one place to another. If there is an inflow of migration, the population substantially increases, and if there is an outflow, the population substantially decreases.

A sudden increase or decrease in population is not always a welcome phenomenon as it puts pressure on resources.

Answer 2

Answer:

The main components of population change are births, deaths, and migration. “Natural increase” is defined as the difference between live births and deaths. “Net migration” is defined as the difference between the number of people moving into an area and the number of people moving out.

Explanation:

The three main processes of change in population are—birth rates, death rates, and migration. Birth rate: It 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 higher than death rates.

Factors that affect population growth are:

• Age of organisms at first reproduction.
• How often an organism reproduces.
• The number of offspring of an organism.
• The presence or absence of parental care.
• How long an organism is able to reproduce.
• The death rate of offspring.