Which boundary type is associated with crust destruction?

• A. Convergent boundaries
• B. Divergent boundaries
• C. Transform boundaries
• D. Passive margins

Answer: (A)

Crust destruction happens where one tectonic plate sinks below another in a process called subduction, which occurs at convergent boundaries. In subduction zones, the oceanic crust is pulled down into the mantle and melted, recycling material that effectively removes crust from the surface. This is why convergent boundaries are associated with crust destruction.

In contrast, divergent boundaries create new crust as magma rises at mid-ocean ridges and forms new lithosphere, so they don’t destroy crust. Transform boundaries involve plates sliding past each other with little if any creation or destruction of crust. Passive margins are not active plate boundaries; they’re simply edges of continents with minimal tectonic activity.