Archimedes' major discovery was _______.

Choose the correct option to complete the given sentence.

Archimedes' major discovery was the principle of buoyancy.

Archimedes' principle indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces. Because of this buoyancy, a body is able to float or submerge over a liquid surface.