The Nile river no longer floods because of the Aswan dam built in the 1960s.
Answer: The Soil: The best soils are found in the southern highland valleys where volcanic eruptions have enriched the earth.
Explanation:
The answer is Dregg did delightfully on his Antarctic test because ... he knew it cold! This puzzle is a play on words; when somebody is fully set for every answer on a test, they can be said to "know it cold." At the same time the Antarctic is recognized for being, in fact, very cold. So in this joke Dregg knew all the answers about the cold weather of the Antarctic.
