Final answer:
Most rift valleys are located along tectonic plate boundaries, such as the Great Rift Valley in East Africa. An exception is the Mid-Atlantic Ridge which is primarily located in the ocean.
Step-by-step explanation:
The majority of rift valleys are located along tectonic plate boundaries. One well-known example is the Great Rift Valley in East Africa, which runs from Mozambique to the Red Sea. It is a result of the movement of the African Plate, dividing it into two smaller plates: the Somalian Plate and the Nubian Plate. The Great Rift Valley is home to deep water lakes like Lake Tanganyika, Lake Victoria, and Lake Albert.
An exception to the typical location of rift valleys is the Mid-Atlantic Ridge, which is a rift zone under the Atlantic Ocean. This rift valley is located primarily in the ocean, rather than on land.