Define the following terms:

(a) Population

(b) Population density

(c) Demography

(d) Resources

(e) Growth rate of population

(a) Population — A population is defined as a group of individuals of the same species living and interbreeding within a given area.

(b) Population density — It is the number of individuals per square kilometre (km²) at any given time.

(c) Demography — It is the statistical study of human population specifically with reference to size and density, distribution and other vital statistics.

(d) Resources — Resource is any substance (natural or artificial), energy or organism which is used by humans for their welfare.

(e) Growth rate of population — It is the difference between the birth rate and the death rate. As long as the birth rate exceeds the death rate, the population grows. If the birth rate is lower than the death rate, the population declines.