8. explain why the cyclist must be fed in order to continue to pedal. (complete sentences)

Brief Explanations:

The body needs energy to perform physical activities like pedaling. Food is the source of energy, providing carbohydrates, fats, and proteins that are broken - down during digestion and metabolism to release energy in the form of ATP. Without a continuous supply of food, the body would run out of energy, leading to fatigue and inability to continue pedaling.

Answer:

The cyclist must be fed because food provides the energy required for the physical effort of pedaling. The body breaks down nutrients from food into energy (ATP) through digestion and metabolism, and without this energy supply, fatigue will set in and pedaling cannot be continued.