Question

along some plate boundaries, continual eruptions occur and cooling lava hardens into new sea - floor rock. as more sea - floor rock forms, older rock pushed away. this is known as sea - floor spreading. where does sea - floor spreading occur? choose 1 answer: a at the divergent plate boundaries of island arcs b at the convergent boundaries of mid - ocean ridges c at the convergent plate boundaries of island arcs d at the divergent boundaries of mid - ocean ridges

Explanation:

Sea - floor spreading occurs at divergent plate boundaries where new oceanic crust is formed. Mid - ocean ridges are locations of divergent plate boundaries. Convergent boundaries are where plates come together, not where sea - floor spreading occurs. Island arcs are associated with convergent boundaries, not sea - floor spreading.

Answer:

D. at the divergent boundaries of mid - ocean ridges