Question

case 1: africa
what geological event is most likely to occur at this plate boundary in the future?
a mountain range will form along the boundary.
subducting plates will cause volcanoes to erupt along the boundary.
lakes and valleys will deepen and widen, eventually causing a part of the continent to break away.
slippage of plates will result in large - scale earthquakes in the region.

Explanation:

At some plate - boundaries in Africa, such as the East African Rift, the plates are pulling apart. This causes lakes and valleys to deepen and widen over time, and can lead to a part of the continent breaking away. Mountain ranges form at convergent boundaries, volcanic eruptions at subduction zones, and large - scale earthquakes at transform boundaries. The description in the question best fits the scenario of a divergent boundary in Africa.

Answer:

Lakes and valleys will deepen and widen, eventually causing a part of the continent to break away.