Question

1. seafloor spreading occurs because molten material rises up from the mantle and enters along the cracks ____.

• in volcanoes on the edge of the continent
• in subduction zones
• in the mid - ocean ridge
• in deep - sea trenches

Explanation:

Seafloor spreading is a process where magma rises from the mantle, erupts, and creates new oceanic crust. This occurs specifically along mid-ocean ridges, which are underwater mountain ranges where tectonic plates diverge. Subduction zones and deep-sea trenches are sites where crust is destroyed, not created, and continental edge volcanoes are not the location of seafloor spreading.

Answer:

C. in the mid-ocean ridge