Question

seafloor spreading is a geological process that occurs at mid - oceanic ridges, where tectonic plates are moving away from each other. as new crust is created by volcanic activity at the ridge, it spreads away from the ridge and pushes the existing crust to either side, resulting in the widening of the seafloor. seafloor spreading is one reason - a the continents are drifting apart. b all earthquakes have their epicenters in oceans. c most active volcanoes are found in the atlantic ocean. d the shape of the seafloor is unchanging.

Explanation:

Seafloor spreading at mid - oceanic ridges causes tectonic plates to move apart. This movement contributes to the drifting of continents. Earthquakes don't all have oceanic epicenters, active volcanoes aren't mostly in the Atlantic Ocean, and seafloor spreading changes the shape of the seafloor.

Answer:

A. the continents are drifting apart.