A boundary described as constructive because magma pushes up as plates pull apart is called a?

A boundary described as constructive because magma pushes up as plates pull apart is called a?

• A. Convergent boundary
• B. Divergent boundary
• C. Transform boundary
• D. Passive boundary

Answer: (B)

Understanding plate boundaries that create new crust as magma rises when plates separate. At divergent boundaries, the plates move apart, allowing mantle material to rise as magma and solidify to form new lithosphere. This ongoing creation of crust is why this boundary is described as constructive. Mid-ocean ridges are classic examples of where this happens. In contrast, convergent boundaries destroy crust through subduction, and transform boundaries slide past each other without making new crust. The description given clearly points to a divergent boundary.

Understanding plate boundaries that create new crust as magma rises when plates separate. At divergent boundaries, the plates move apart, allowing mantle material to rise as magma and solidify to form new lithosphere. This ongoing creation of crust is why this boundary is described as constructive. Mid-ocean ridges are classic examples of where this happens. In contrast, convergent boundaries destroy crust through subduction, and transform boundaries slide past each other without making new crust. The description given clearly points to a divergent boundary.