Which of the following describes rotational capsizing force?

The definition of rotational capsizing force pertains to the effects of fast-moving water on a vessel, particularly as it interacts with environmental factors such as waves, currents, or other forces acting upon it. In the context of water rescue and boat stability, this force occurs when a boat is influenced by rapidly changing conditions and can lead to a loss of balance or capsizing as the water moves around the hull. This interaction makes it critical for rescuers and boat operators to understand how rotational capsizing force can impact the safety and stability of small vessels in harsh water conditions.

The other options explore different aspects of forces related to water dynamics or flotation but do not accurately capture the nature of rotational capsizing force. For instance, forces that stabilize small boats would typically involve buoyancy and structural integrity, while a force that keeps swimmers afloat would primarily relate to buoyancy principles. A force that pulls objects underwater would describe submersion dynamics and is separate from the rotational actions affecting a boat's stability. Therefore, option B specifically characterizes the role of fast-moving water in causing rotational capsizing, making it the appropriate choice.