What does "multitude" refer to?

"Multitude" refers to a large, indefinite number of people or things. It conveys a sense of abundance or great quantity. This term is commonly used in various contexts to emphasize that there is more than just a small group or limited amount. In contrast, the other choices specify smaller quantities or entirely different concepts. A single item indicates only one, a few options suggests a small number, and a negative number does not relate to the idea of quantity at all. Therefore, the meaning of "multitude" aligns perfectly with the idea of a large and unspecified number, making it the correct answer.