In Paragraph 39, Laura compares her classmates' laughter to "the sound of a rattlesnake." What effect does this have?

Pls, i really need on this question?

How are the two arguments made in the passages different? a. the first passage claims that pets in class will children with health problems; the second passage says pets will make some health problems worse. b. the first passage claims that students’ nervousness will decrease around pets; the second says that students’ nervousness will increase around pets. c. the first passage claims that pets will make the teacher’s work easier by keeping students busy; the second passage says pets will make the teacher’s work harder. d. the first passage claims that pets in school will be good for kids’ mental health; the second passage says pets will be bad for kids’ mental health.

Read the excerpt from”do not go gentle into that good night” which statement best describes the effect of the refrains in this excerpt?