which concept is described in the theory proposed by hess?\no continents do not move.\no cool rock pushes…

which concept is described in the theory proposed by hess?\no continents do not move.\no cool rock pushes through the crust.\no trenches are sites of seafloor spreading.\no mid - ocean ridges are sites of seafloor spreading.
Answer
Answer:
Mid - ocean ridges are sites of seafloor spreading.
Brief Explanation:
Hess proposed the theory of seafloor spreading. Mid - ocean ridges are key sites in this theory where new oceanic crust is formed as magma rises and solidifies. Continents do move (contrary to first option), hot (not cool) rock pushes through crust, and trenches are sites of subduction, not seafloor spreading.