Question

Rift valley means _______________________.

• A. A steep valley by river erosion
• B. A valley with gentle slopes
• C. A valley formed by the sinking of ground between two almost parallel faults
• D. A valley carved by aeolian erosion

Answer 1

The correct option is C A valley formed by the sinking of ground between two almost parallel faults

• When two plates of earth's crust move apart from each other, a long narrow depression is formed due to the sinking of ground which is called a rift valley eg. east African rift valley. Hence option C is the right answer.
• The rift valley is not formed due to river or aeolian(wind) action. Also, the slope in the rift valley is almost vertical thus very steep hence other options are incorrect.