Here's why:
* Abstract nouns represent ideas, concepts, qualities, or states of being. They are not tangible things you can touch or see.
* Ceremony is a formal act or series of acts performed on a special occasion. It's a concept, not something you can physically hold.
Let's compare it to concrete nouns:
* Chair: You can sit on a chair, it's a tangible object.
* Ceremony: You can attend a ceremony, but you can't touch the ceremony itself.
Therefore, "ceremony" fits the definition of an abstract noun.