Identifying Rhetorical Strategies in Sentimentality

Read the following passage from a fictional letter:

“Dear Emily, I cannot help but feel a deep sense of nostalgia as I sit down to write to you. The memories of our childhood adventures bring a smile to my face. Remember the treehouse we built? The laughter we shared while making up stories beneath its branches?”

In this excerpt, the author uses which of the following rhetorical strategies to convey sentimentality?