Earth’s crust sits on top of the mantle. select the best answer from the choices provided t f

The layer of Earth that is under the Crust is called the Mantle - so the statement is correct. Crust is the solid shell on which we live and it's a lot thicker under the land than under the oceans.

Mantle is fluid in contrast to the Crust - so the Crust can be said to float over the mantle.

Answer primary waves;

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary.