The answer is (A) Ethos which means appear to Ethics.
Explanation:
While the main idea is usually in the first sentence, the next most common placement is in the last sentence of a paragraph. The author gives supporting information first and then makes the point in the last sentence.
Krakauer describes the discovery of Chris's abandoned car in Nevada. He also describes Chris's movements around the West. As Chris travels, he makes friends, forages, hitchhikes, and canoes. His journal chronicles his adventures and satisfaction with his new way of life.
The first box and the third box are correct, they were included in the passage
Hope this helps
-GoldenWolfX