Read the stanza from Shakespeare’s “Sonnet 18.”

Shall I compare thee to a summer's day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May,
And summer's lease hath all too short a date:

What is the purpose of these lines?

to complain about the intense heat and humidity of summer
to persuade a loved one to visit during a warm season
to express love by likening a loved one to a nice day
to argue that hot weather is more pleasant than cold weather