Why is the word cheerily in parentheses andin italics?

The Word "cheerily" is likely in parentheses and italics to indicate that it is a stylistic or descriptive choice made by the author. This formatting can emphasize the tone or mood of the text, suggesting that the action described is done in a cheerful manner. Additionally, it may serve to highlight the Word as an adverb, providing further context or nuance to the sentence.