Answer: (B) complex mountainous region in the western U.S
Explanation: The North American Cordillera covers extensive chains of mountain ranges, plateaus, basins. It covers a length of 6400km.
There are 3 mountain systems in the North American cordillera region.
1. Pacific border province.
2.,The rocky mountain systems.
3. Cascade-Sierra mountains.
<span>Farmers from the Netherlands, France, and other European colonies that settled in South Africa became known as Boers.
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Answer:
Option C. Is used to cool the drill bit and to flush rock cuttings up and out of the drill hole
Explanation:
Drill mud plays a vital role in the drilling process. Its addition into the well-bore does a lot in enhancing the drilling processes and activities.
Among other importance and function of the drill mud /fluid:
1. It is used to cool off the drill bit
2. It flushes rock cuttings out of the drill hole
3. High pressure control
4. Providing buoyancy
5. Lubrication
Answer:
Erosion can make the soil more fertile by eliminating certain wasteful materials, and leaving behind a cleaner, more nutrient-rich soil that farmers can use to cultivate grows more easily, that lead to a higher yield. For example, erosion is a way that nature uses to eliminate rotting matter from the soil.
Answer:
Choice B
Explanation: Most ocean water is salty so we can't drink it without desalination units.
