|English Grammar Noun||Collective Noun|
The name used to represent a group or collection of persons or things taken together as a whole.
For example, crowd, bunch, parliament, etc.
Here the word audience represents a group of people. Therefore, it is a collective noun.
A family is always composed of many people. Therefore, the word family is a collective noun.
The term army again represents a group of people who safeguards a country. Therefore, army is a collective noun.