Question

Q3. Define the following topics
Density of population
Life Expectancy
Immigration
Satellite cities​

Answer 1

Population density (in agriculture: standing stock and standing crop) is a measurement of population per unit area, or exceptionally unit volume; it is a quantity of type number density. It is frequently applied to living organisms, most of the time to humans. It is a key geographical term.[1] In simple terms, population density refers to the number of people living in an area per square kilometre.