Which skill is likely useful for someone learning to float effectively?

The skill of finning is particularly useful for someone learning to float effectively because it involves gentle, subtle movements of the legs that help maintain balance and stability in the water. Finning allows a learner to adjust their position easily, aiding in buoyancy management and helping them understand how to distribute their weight appropriately while floating. This technique encourages a relaxed body posture, which is essential for floating, as it keeps the body positioned in a way that maximizes surface area in contact with the water, enhancing buoyancy.

The other skills, while beneficial for overall swimming proficiency, do not directly focus on the intricacies of maintaining a floating position. Sculling is a related movement but primarily emphasizes hand motions rather than leg positioning and overall body balance. Backstroke and breaststroke are more advanced swimming techniques that focus on propulsion and coordination rather than floating technique itself. Therefore, finning is the most suitable skill for someone specifically learning to float effectively.