Question

What are the three main factors that cause population change?
(a) births, deaths and marriage.
(b) births, deaths and migration
(c) births, deaths and life expectancy.

Answer 1

C. Birth , deaths and life expectancy

Answer 2

Answer:  

(b) Births, deaths, and migration

Explanation:

Birth and Death Rates naturally increase or decrease.  

The 'birth rate' is the word used to define the 'number of babies born in each year' per 'thousand people in a population'.

The 'death rate' is the term used to define the 'number of people’s deaths in each year' per 'thousand people in a population'.  

The 'seasonal motion of people' from 'one region to another' in search of 'better job opportunities or living conditions' is called 'migration'.