There are two ways to look at this question.
First, if you do not understand what the assignment requires from you, you should ask your instructor. Instructors have the responsibility of making their assignments clear to their students so that students can understand what is expected. If you do not understand, contact your instructor during office hours or by email.
Second, if you understand the assignment but don't understand what a good answer would entail, you have at least two options. First, you can ask your instructor for help. You should explain what you understand and what you don't understand so the instructor can help you. Second, you might consult someone like a reference librarian. You can explain what you are trying to accomplish to the librarian who can help you to find sources that might help you complete the assignment.