You didn't underline anything, so we cannot know for sure what the correct answer is. However, I'll just write down the entire infinitive phrases in these sentences, and you can see the answer based on that:
1. to see a great play
2. to cheer good plays
3. to practice until you know all the plays
The answers are *It increases the strength of the verse’s foward movement.* and *It creates a sense of unity among the actions shown.*
Answer:
2) Coffee's,Caffeine's
3) Bouquet of flowers, board of directors
4) Student's, Bakery's
5) Shepherd's, give
6) Grammar's, enthusiasm
