Answer:
A. divergent plate boundary
Explanation:
Divergent boundary are boundaries formed by the moving apart of the earth tectonic plates causing an uprising of molten magma to form a new lithospheric crust . The divergent plate boundary is prevalent in the oceanic crust. This occurs when two oceanic crust moves away form each other.
This divergence occurs in the Atlantic oceanic crust. The oceanic crust moves away from each other causing mantle material(magma) to be introduce to the surface through the mid oceanic ridge. The magma seep through fissures and cracks to form new oceanic crust . Due to the introduction of magma this area is known for volcanic eruption . The formation of new crust is due to the constant streaming of mantle material through the mid oceanic ridge causing the two plates to move further apart . But the movement is usually very slow . As we move away from the mid oceanic ridge the rocks become older.
The picture below indicate a divergent plate boundary.
