According to the theory of plate tectonics, where should the seafloor be the youngest? immediately adjacent to the continents immediately adjacent to both sides of the mid-ocean ridge in the polar regions of earth around the southern tip of africa

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.