C. The Tigris-Euphrates River system is fed by seasonal rainy area of the Ethiopian Highlands
Answer:one of the world's largest observatories.
Explanation:Cerro Tololo is located in the northern part of the South American country of Chile, more specifically, in the Coquimbo region of the country. The Cerro Tololo Inter-American Observatory, is part of the United States's National Optical Astronomy Observatory, and it is one of the biggest in the world of this type.
Answer:
b
Explanation:
this is because when the level of pollution gets higher than the people of that state get diseased
I'd say counties because there are way more of them