Here's why:
* Abstract nouns represent qualities, concepts, or ideas that cannot be touched. "Character" refers to the mental and moral qualities distinctive to a person or thing. You can't physically hold or see "character."
* Concrete nouns represent things that can be touched or sensed. While a person has character, you wouldn't physically hold or touch their character.
However, "character" can also be a concrete noun in some contexts.
For example:
* "The character in the story was brave." Here, "character" refers to a specific person in a fictional story. You can think of the character as having a physical representation.
In summary, the classification of "character" as abstract or concrete depends on the context of its use.