I have seen them riding seaward on the waves
Combing the white hair of the
waves blown back
When the wind blows the
water white and black.
A. dialect.
B. imagery,
C. narration.

its a hard situation i cant really answer because the essay is for you to write.

a. "to practice" is the best phrase to complete the sentence.

explanation:

during the summer, she likes to practice her soccer skills so that she is ready to play in the fall.

(note that : all the other options "the practicing of", "practice for" and "to do a practice on" are inappropriate as they make the sentence grammatically incorrect.)