The relevant part of the letter being described by the question is known to be the D. Closing.
What is included in a letter's closing?
The closing section in the letter refers to a closing salutation given such as "Sincerely" or "Best Regards."
In this instance, the closing is "Love" which is a good closing for people you are close to and relate informally with.
Find out more on letter closings at https://brainly.com/question/1470155.
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