Which evidence from the sea floor shows that tectonic plates move?

a) The sea floor is much older than any of the continents.

b) The sea floor is youngest near a mid-ocean ridge and older farther away.

c) Mid-Ocean ridges circle Eqarth like seams in a baseball

d) The sea floor is thinner than continental crust.

"The sea floor is youngest near a mid-ocean ridge and older farther away" is the one evidence from the sea floor among the following choices given in the question which shows that tectonic plates move. The correct option among all the options that are given in the question is the second option or option "b".