Final answer:
The energy transformation that occurs when a cyclist eats a full meal before riding a bike is the conversion of chemical energy in food into kinetic energy in the cyclist's body.
Step-by-step explanation:
During the process of eating a full meal before riding a bike, the energy transformation that occurs is the conversion of chemical energy in food into kinetic energy in the cyclist's body. When we eat, our bodies break down the macronutrients in the food (carbohydrates, fats, and proteins) and convert them into a form of chemical energy called ATP (adenosine triphosphate). This chemical energy is then used to power the muscular contractions that enable the cyclist to pedal and move the bike forward.