Concept:Both lakes are part of the East African Rift system.
Explanation:Lake Kivu lies on the border between Rwanda and the Democratic Republic of the Congo.
It is found in the Albertine Rift, which is the western branch of the East African Rift.
Lake Malawi lies between Malawi, Tanzania, and Mozambique.
It occupies the southern branch of the East African Rift system.
Because both lakes were formed by tectonic rifting, they are classified as rift valley lakes.
They are not crater lakes, and their tourist attraction is not the main defining relationship.
Answer:D. Are rift valley lakes.