Final answer:
The Red Sea, Gulf of Aden, Dead Sea, Jordan River valley, Mt. Kenya, and Mt. Kilimanjaro are all related through the Great Rift Valley, which was created by a rifting event that split the African plate.
Step-by-step explanation:
The Red Sea, Gulf of Aden, the Dead Sea, the Jordan River valley, Mt. Kenya, and Mt. Kilimanjaro are all geographically linked as they are part of or located near the Great Rift Valley. This valley is the result of a rifting event that led to the splitting of the African tectonic plate into the Nubian and Somalian subplates. The features mentioned are formed due to tectonic activities such as spreading and rifting rather than a single meteorite impact, transform plate boundary, convergence, or being solely active during the Precambrian.