Harry hess proposed that when two oceanic plates met each other, the denser plate would sink under the less dense plate. this is known as

This is the concept of subduction. When two plates meet, the more dense one will subduct, or slide under, the lighter plate. Both plates, being oceanic, are lighter than the actual ocean floor and will allow one to slip beneath the other, leading to earthquakes and volcanic activity.

Climate change to earth function human can't reduce climate

We can not answer this question because we cannot see the graph,sorry< 3