LIFE SCIENCE

Detailed explanation-1: -The movement of organisms out of a range is called emigration. It is the migration or movement of individuals out of a population and leads to a decrease in the size of a given population. Immigration is the arrival of new individuals into a population.

Detailed explanation-2: -In animal population, dispersal can be divided into following different forms: 3.1 Emigration: It is the outward movement of organisms in one direction from a given population. Emigration of individuals excessive production of young ones, shortage of various resources, unfavourable environmental conditions.

Detailed explanation-3: -external migration: moving to a different state, country, or continent. emigration: leaving one country to move to another. immigration: moving into a new country.