Answer:
So long as men can breathe or eyes can see,
So long lives this, and this gives life to thee.
Step-by-step explanation:
These lines are from William Shakespeare's famous poem called "Shall I compare thee to a summer's day?" or commonly known as "Sonnet 18". In this poem, the poet uses the rhyme scheme of ABAB till the twelfth line. However, the last two lines of poem ends with the rhyme scheme of AA because it consists of only 14 lines, hence called a sonnet.
The rhyming couplet at the end is the most effective rhyme scheme because it sums up the whole argument of the poem and reveals the main theme.