EVERYDAY SCIENCE

Detailed explanation-1: -Food, water, shelter, predation, and density are all things that can allow a population to grow or cause it to decline.

Detailed explanation-2: -Population growth rate is affected by birth rates, death rates, immigration, and emigration.

Detailed explanation-3: -Many factors such as birth rate, death rate and dispersion affect population density. Death and emigration i.e. individuals moving out of a population tend to decrease population density, while births and immigration i.e. when individuals move into a population tend to increase population density.

Detailed explanation-4: -Population density is often measured in three different ways. There is arithmetic density, physiological density, and agricultural density.