The science of swimming
Swimming involves forces, movement and skills learned with a qualified teacher.

Picture in words: 1. Buoyancy: Water pushes upward on an immersed body. This upward force is buoyancy.
2. Push: Hands and feet can push water backward; the water pushes the swimmer forward.
3. Drag: Water resists movement. Body position changes how much resistance a swimmer feels.
4. Learn safely: Learn with a qualified instructor and close adult supervision in a suitable swimming area.

One more wonder: This picture explains forces. It cannot teach water safety or make someone able to swim.
Never practise alone, hold your breath as a challenge, or rely on a toy float for safety. An attentive adult must supervise children near water.

Question: What is the upward push from water called?
Answer: Buoyancy

Sources:
US Navy Museum: submarine buoyancy — https://www.history.navy.mil/get-involved/for-educators/lesson-plans/elementary-school-lesson-plans/history-of-submarines/build-your-own-submarine.html
American Red Cross: swimming safety — https://www.redcross.org/get-help/how-to-prepare-for-emergencies/types-of-emergencies/water-safety/swim-safety.html

Reviewed 28 September 2026. Simplified educational illustration, not to scale.
https://atherverse.com/kids/how-things-work/swimming/