Here's why:
* Abstract nouns refer to concepts, qualities, ideas, or feelings that you cannot touch or see. Patience is a quality or virtue, making it an abstract noun.
Let's break down the other options:
* Proper nouns are specific names of people, places, or things (e.g., John, London, Eiffel Tower).
* Collective nouns refer to groups of people or things (e.g., team, flock, army).
* Material nouns refer to substances or materials (e.g., wood, gold, water).
Since patience doesn't fit into any of those categories, it's an abstract noun.