1. Seafloor spreading is occurring at
the boundary between the

divergent plate boundaries

Explanation: Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.

answer; //i do believe that the correct answers are ; ///p waves and s waves..