■ The people (or a group of inhabitants of a particular species) living in a particular area is known as the population of that area.
■ This group of individuals make up a nation. ■ The density of the population can vary from place to place depending on various factors like :- climate, temperature etc.
■ The total population of the world (according to a recent survey/census in December 2021) was estimated to be 7.9 billion.
■ The 2 most populous countries in the world are :- China & India.
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