How are the African plate and South American plate moving relative to eachother

African plate and South American plate move away from each other.

Explanation:

South American plate is the smallest major plate and includes the continent of South America and a major part of Atlantic Ocean.

The western side of South America is part of convergent plate tectonic boundary and thus experiences earthquakes. The eastern edge is in the Atlantic Ocean at a divergent plate boundary.

The South American plate and African plate move away from each other. This divergent plate motion creates young oceanic crust.