Here are the answers to your questions:
Question 1:
A) What is true about stories from a culture’s oral tradition?
Answer: They still use structures that will be familiar to modern readers.
Question 2:
A) What does the first mouse think of her cousin?
Answer: She is lazy.
Question 3:
A) The structure of the story, “The Black Horse” features which type of structure?
Answer: problem and solution
Question 4:
A) What is the problem faced by the rider of the black horse?
Answer: The rider is thirsty, and there is no water.
Question 5:
A) What are these words called?
Answer: borrowed words