This excerpt narrates how the man and woman arrive to the top of the mountains, tired and beat. So they explain through really predictable words such as: exhausted, went to sleep... and also their desperation to get some rest when they say: <em>"I took a buffalo rope from the packs and wrapped myself in it..."</em>
Looks like the last option is the one most likely to be the correct answer, as the other ones don't really help talk about the <em>benefits </em>of a plant-based diet. However, quizzes like this are fickle things so I can't promise this will be the correct answer. Good luck!