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Question

1. The tectonic forces originate from within the earth. ___________
2. A cordillera is a French term which stands for several mountain systems. ________
3. The plateaus are the youngest landforms on earth. ___________
4. The river valleys in the plains have been the cradle of civilization. _________

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Solution

1. The given statement is true.

Explanation: Tectonic forces originate within the Earth's surface. They cause irregularities on the surface of the Earth, thereby forming highlands and lowlands.

2. ​The given statement is false.

Explanation: Cordillera is a Spanish term that stands for several mountain systems. They stretch over a large area of a continent.

3. ​The given statement is false.

Explanation: Plateaus are land masses that rise abruptly from the neighbouring areas with steep slopes. Their top is either rounded or flat. They are the oldest landforms on the Earth.

4. ​The given statement is true.

Explanation: Plains are wide stretches of land at relatively low height. They are fertile lands formed by the deposition of sand and silt brought by rivers. River valleys were the cradles of civilisation in ancient times.

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