Question

In both literature and art, a _______ is an object or a detail that represents an idea. A. Subject B. Context C. Symbol D. Theme

Answer 1

C. Symbol

Subject is the focus of the literature/art, context is what it's about or the surrounding meaning, theme is the subject or topic of lit or a work of art (though it can also be a main idea).

Symbol is the most correct answer, because it is a thing, object or detail, that represents an idea, as said.