The girl sprinted across the street with curly red hair.
B.
The trip to the Grand Canyon was tremendous fun.
C.
Mom bought me a pair of shoes with colorful laces.
D.
Let's order two large pizzas with pepperoni and cheese.
c. solo lyrics
b. opening line
d. title
The right answer is "a. refrain ".
The explanation for this answer is that the refrain serves to reaffirm to those who are reading, the meaning of the work, then there will be the key words for the understanding of that meaning. In the case of the unison poem it is used to affirm the thought that is expressed. It better explains the main meaning of the poem.