Question

the diagram below shows some of earths tectonic plates and their boundaries. the type of boundary between certain plates is indicated using arrows.
at which two plate boundaries is old crust being destroyed?
choose 2 answers:
a the cocos and caribbean plate boundary
b the cocos and nazca plate boundary
c the nazca and pacific plate boundary
d the nazca and south american plate boundary

Explanation:

Old crust is destroyed at convergent plate boundaries, where plates move toward each other (indicated by arrows pointing inward).

• Option A: The Cocos and Caribbean boundary has inward-pointing arrows (convergent), so crust is destroyed here.
• Option B: The Cocos and Nazca boundary has up/down arrows (transform, crust not destroyed).
• Option C: The Nazca and Pacific boundary has side-by-side arrows (transform, crust not destroyed).
• Option D: The Nazca and South American boundary has inward-pointing arrows (convergent), so crust is destroyed here.

Answer:

A. the Cocos and Caribbean plate boundary
D. the Nazca and South American plate boundary