Which desert can be found across the North of Africa?

The Sahara Desert is unequivocally the correct answer, as it is the largest hot desert in the world, spanning across much of North Africa. Its vast expanse covers approximately 9.2 million square kilometers, influencing the climate and geography of numerous countries. The Gobi Desert, while significant, is located in East Asia, primarily in China and Mongolia, making option B incorrect. The Kalahari Desert is found in Southern Africa, covering parts of Botswana, Namibia, and South Africa, thus ruling out option C. Lastly, the Thar Desert is situated in the Indian subcontinent, primarily in India and Pakistan, rendering option D incorrect. This question tests geographical knowledge of major global landforms.