Answer:
Immigrants- people who leave their native country
Emigrants- people who come to live in a new country
Population trend- changes in population over a period of time
Natural increase- the difference between the birth and death rate
Step-by-step explanation:
Immigration is described as the flow of people from their home country to another.
Emigrants defined as people who leave their own country to settle permanently in another. The reason for the settlement in other country is to get facilities and jobs.
Population trend refers to changes over time and can include changes in population over time.
Natural increase term refers to the difference between the numbers of births and deaths in a population.