Answer:
A population is a distinct group of individuals, whether that group comprises a nation or a group of people with a common characteristic.
or
A population is the number of organisms of the same species that live in a particular geographic area at the same time, with the capability of interbreeding.
3 types of population:
overpopulation: refers to a population which exceeds its sustainable size within a particular environment or habitat
optimum population: is a concept where the human population is able to balance maintaining a maximum population size with optimal standards of living for all people.
under populations : is when there are not enough people to make full use of the resources and technology of the place they live in.
advantages of overpopulation :
1. availability of human resources and help in economic development.
2. availability of cheap labour .
3. High demand in industry .
4. increase in military might.
disadvantages of overpopulation:
1. over exploitation of natural resources.
2.lack of space.
3.pressure on employment opportunities.
4. inadequate educational ,medical and other facilities.
advantages of underpopulation:
1. availability of employment opportunities.
2 low Pressure on natural resources.
3. less pollution.
4. adequate educational ,medical and other facilities.
disadvantages of underpopulation:
1. shortage of workers leading to low productivity.
2.there will less tax payers leading to low income for government.
3. wastes resources.
4.closure of service.
