What revision would correct the spelling error in the following sentence: "Until recess was over, the girls talked with they're friends on the playground?"

The revision involves changing "they're" to "their," which is the correct form to indicate possession. In this context, "their friends" indicates that the friends belong to the girls, which is the intended meaning of the sentence. "They're" is a contraction for "they are," which does not fit this context since the sentence requires a possessive pronoun to correctly convey ownership. Therefore, changing "they're" to "their" correctly addresses the spelling error and enhances the clarity of the sentence.