Question

Which of the following statements about population is correct?
A. Population is a dynamic phenomenon.
B. The number, distribution and composition of population are static.
C. Population of a country always increases with time.
D. Migrations do not affect the population of a country.

Answer 1

Hint: The population is a group of individuals of the same species living within the same geographical area and is capable of interbreeding. These individuals can move within or between the countries and also they can die or give birth to new individuals.

Complete step by step answer:
-Option (A) is correct. The population is a dynamic phenomenon which means that it keeps on changing over time. The population change occurs due to several factors such as- birth ratio, death ratio, immigration, emigration, etc. These factors have an impact on the number, distribution, and composition of a population.
-Option (B) is incorrect. The number, distribution, and composition of the population are not static because it keeps on changing due to immigration, emigration, changes in birth ratio and death ratio.
-Option (C) is incorrect. The population of a country does not always increase with time. It can also decrease when the emigration and death ratio is increased as compared to the immigration and birth ratio.
-Option (D) is incorrect. Migration is a movement of people across the regions and affects the population of a country. It is the determining factor of population change. The internal migration does not change the population size because the movement of people is within the country thereby, maintaining the constant population size but the migration across the countries does affect the population size.
Hence, the correct option is (A).

Note: The population changes with time, i.e., dynamic. It can be increased or decreased depending on the overall rate of immigration and birth ratio or emigration and death ratio, respectively. The population can never be static because the number of individuals within the same geographical area keeps on increasing or decreasing.