PLZ HELP DUE TMR What does "explaining the contributions" mean??

The question is “Write a brief paragraph explaining the contributions of your study case”

Which sentence about subject-verb agreement is not true? a. singular subjects go with singular verbs. b. plural subjects go with plural verbs. c. when the subject and the verb go together, they agree. d. plural verbs go with singular subjects.

What is one way that “the maori: genealogies and origins in new zealand” contrasts with “the raven and the first men: the beginnings of the haida”? a. the maori myth features courage, but the haida myth does not. b. the maori myth features community, but the haida myth does not. c. the maori myth features the gods, but the haida myth does not. d. the maori myth features deception, but the haida myth does not.

Which traits are strongest in your persuasive eassy: ideas, orginization, voice, word choice, sentence fluency, or conventions? (provide textual evidence from your persuasive essay to support your answer.)