Buoyancy is the net force on a body or fluid parcel produced by a pressure gradient in a gravitational or accelerating fluid. Density differences make displaced parcels rise or sink relative to their surroundings.
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Buoyancy is the upward force that an object experiences when it is submerged in a fluid (liquid or gas). This force is the result of pressure differences within the fluid, which are caused by the weight of the fluid itself. The concept of buoyancy is primarily explained by Archimedes' Principle, which states that an object immersed in a fluid experiences a buoyant force equal to the weight of the fluid displaced by the object.