Question

what force does buoyancy counteract to keep this rubber duck afloat? electromagnetic gravity friction

Explanation:

Buoyancy is an upward force exerted by a fluid. When an object floats, buoyancy counteracts the force pulling it downward. Gravity is the force that pulls objects toward the Earth. For a rubber duck to stay afloat, buoyancy (upward force) must counteract gravity (downward - pulling force). Electromagnetic force involves interactions between electrically charged particles and is not relevant here. Friction is a force that opposes relative motion between surfaces in contact and is also not the force counteracted by buoyancy for floating.

Answer:

gravity