Photosynthesis occurs in the leaves
Surface currents pick up on energy from the ocean floor. As they travel, they move around energy from one place to another. This affects the climate in its environment.
Stomach acid helps protease enzymes to destroy harmful microorganisms that may be present in the food. Fats and oils, or lipids, provide insulation and an energy store for our bodies. Helped by bile from the liver, lipase enzymes break down the lipids into fatty acids and glycerol, so they can be stored.