Question

JMid-ocean ridges, which contribute to the process of sea-floor spreading, form as a result of _____.


older ocean floor that moves toward the ridge


a rift valley, like the Red Sea, being filled


earthquake activity that causes subduction


volcanic activity that produces magma

Answer 1

Mid-ocean ridges, which contribute to the process of sea-floor spreading, form as a result of **volcanic activity that produces magma**. This magma rises to the surface at divergent boundaries, creating new oceanic crust as tectonic plates move apart.