What is the significance of the sentence "There would be only a little water to drink and nothing at all to eat"?

If your choices are the following:

a. It explains why vision quests are important.

b. It describes the purpose of a vision quest.

c. It gives us supporting ideas or details about a vision quest.

d. It is an explanation for why the youth was afraid of Coyote Woman

Then it signifies that d. It is an explanation for why the youth was afraid of Coyote Woman