Here's why:
* Collective Noun Definition: A collective noun refers to a group of people, animals, or things considered as a single unit.
* Nation as a Group: A nation is a group of people who share a common culture, history, and often territory.
Examples:
* "The nation mourned the loss of their leader." (The nation is a single entity, even though it's made up of many people.)
* "The nation celebrated its independence day."
Important Note: While "nation" itself is a collective noun, it's important to remember that you can also use plural forms of "nation" to refer to multiple countries: "The nations of the world came together for the summit."