The upward force experienced by a solid when partially or wholly immersed in a fluid is called ________.

• According to Archimedes’ principle, when a body is immersed fully or partially in a liquid, it experiences an upward force that is equal to the weight of the liquid displaced by it. 
• The upward force exerted by the liquid on the body is known as upthrust or buoyant force.
• Buoyant force=$\mathrm{\rho }\times V\times \mathrm{g}$ 
  Where $\mathrm{\rho }$= denotes the density of the fluid, g denotes acceleration due to gravity, and V denotes the volume of the displaced liquid.

Therefore, 'Buoyant force' is the correct response.