What features of the ocean floor indicate tectonic activity?

The Earth's surface is covered by a series of crustal plates.The ocean floors are continually moving, spreading from the center, sinking at the edges, and being regenerated.Convection currents beneath the plates move the crustal plates in different directions.The source of heat driving the convection currents is radioactivity deep in the Earths mantle.

The enviroment with hedge hogs

Answertaurus is the highest in the sky;