Question

the thickness of The crust below the continent is less as compared to oceans

Answer 1

Continental crust is also less dense than oceanic crust, though it is considerably thicker; mostly 35 to 40 km versus the average oceanic thickness of around 7-10 km. About 40% of the Earth's surface is now underlain by continental crust.

Answer 2

layers that had less dense such as the crust flute on a player that a denser such as the Mantle both question trust and Continental Crust and less dense than the Mantle but questioner crust is denser than Continental crust this is partly why the continents are at a higher elevation than the ocean floor