Which marks an increasing break between the African and the Arabian tectonic plates?

Question

Two tectonic plates and small corners of two others lie under the African continent. These are the African Plate, part of the Eurasian and the Arabian Plates and which other?

Answer 1

The Red Sea

A rift valley is formed by the subsidence of a part of the Earth’s crust between dip-slip faults, and the Red Sea rift extends from the Dead Sea Transform fault system, to an intersection with the Aden Ridge and the East African Rift. The Great Rift Valley is in the process of splitting the African Plate into two new separate plates.