Which of these natural phenomena is least likely to cause the formation of a large plain valley between two mountains, in a very short time?

By the triangle inequality theorem, if two sides of a triangle have lengths of 3 and 7, what are all the possible lengths of the third side? a) 3 < x < 8 b) 3 < x < 7 c) 4 < x < 10 d) 5 < x < 7

The point where two air masses meet is called a

Why is terracing used in southeast asian agriculture?