Explanation:

Both statements are incorrect.

Rifting

• Scientists have predicted that a new ocean would be created as Africa gradually splits into two separate parts.

• Rifting - The Earth’s lithosphere is comprised of the crust and upper part of the mantle.

• Lithosphere is divided into several tectonic plates that are not stationary and move in relation to each other at varying speeds.

• Tectonic forces not only move the plates but also have the potential to cause them to rupture.

• These ruptures result in the formation of a rift and potentially leading to the creation of new plate boundaries.

• Rifting refers to the geological process in which a single tectonic plate is split into two or more plates separated by divergent plate boundaries.

East African Rift

• The three plates, the Nubian African Plate, Somalian African Plate and Arabian Plate, are separating at different speeds.

• The Arabian Plate is moving away from Africa at a rate of about an inch per year, while the two African plate are separating even slower, between half an inch to 0.2 inches per year.

• East African Rift was formed due to the separation of Somalian African Plate from the Nubian and Arabian plate.

• East African Rift is the oldest and best defined rift occurs in the Afar region of Ethiopia and this rift is usually referred to as the Ethiopian Rift.

Further to the South a series of rifts occurs which includes

• Western branch - Lake Albert Rift or Albertine Rift which contains the East African Great Lakes

• Eastern branch – Kenya Rift or the Gregory Rift, roughly bisects Kenya north-to-south on a line slightly west of Nairobi.

Hence option 4th is correct.