How does the repeated phrase “act your age” contribute to the story?

The phrase "act your age" is a term that people would use to tell you to behave. They expect you to act more mature or just want you to stop fooling around.

the correct answer would be d, i never like waking up.

explanation:

iambic tetrameter is a meter which is basically a line consisting of four feet of iambic and it is used in poetry. it consists of unstressed syllables followed by a stressed syllable. in this question, the only statement which is giving the feel of being stressed is option d, which says that i never like waking up. it means the person is feeling stressed whenever he wakes up. he never likes to wake up and and whenever he wakes up, he doesn't like it. so a sense or feel of being stressed is in this statement.  

c hydrophobia is the answer