She gaily talked ___ art and literature.

Gaily means in a cheerful or light-hearted way
The correct preposition in the sentence "She gaily talked of art and literature" is "of."

Explanation:

1. She gaily talked of art and literature.

   • This usage implies that the subject, "she," engaged in lively conversation about the topics of art and literature. The preposition "of" is commonly used to indicate the subject matter or content of someone's speech or discussion.

2. She gaily talked for art and literature.

   • This would suggest that she spoke in favor of or on behalf of art and literature, which may not convey the intended meaning in this context. The preposition "for" is not suitable for expressing the content of the conversation.

3. She gaily talked to art and literature.

   • This doesn't convey a meaningful relationship. The preposition "to" is used to indicate a direction of communication toward a person, not a subject.

4. She gaily talked at art and literature.

   • This doesn't convey the intended meaning either. The preposition "at" is typically used to denote a location or direction rather than the content of speech.

In summary, "She gaily talked of art and literature" is the correct usage to convey that the conversation revolved around the topics of art and literature.