Correct Answer: between two faults

Solution : The correct answer is between two faults .

When there is tension or faulting in the earth's crust, two types of landforms are formed. They are block mountains and rift valleys. Rift valleys are formed when there is excessive tension in the earth's crust, because of which a block of crust subsides down, forming rift valleys. For example- Narmada valley, Baikal Rift Valley, Rhine Rift Valley etc.