Question

How is population size affected by birth, death,how is population size affected by birth, death,immigration?

Answer 1

Population size is affected by the following factors:

• Birth: As the birth rate of population rises, there is addition of new members in the existing population. Hence the population increases.
• Death: The population decreases due to increase in death rate.
• Immigration: Immigration refers to the process of inhabitation of land by new people. This increases the population size.
• Emigration: Emigration refers to the process of leaving of existing inhabitants to a foreign land. This decreases the population size.