Which details from "The Oasis: Africa" best support the central idea that nature can be severe and unkind? Select each correct answer. "Lulled by the soft music of the brook, in infinite content, I sank back on to the soft carpets, and was soon in a dreamless slumber." “Footsore and weary, but ever before us the pointing finger of the Arab Sheikh, and his ceaseless: ‘On, on.’” "Sand in the scanty food, sand in the brackish water—water that was drunk lukewarm from a clammy, loathsome water-skin." "Sweating in the heat, we had lost the whole day, dreading to be buried alive in the drifting sand."