C. During exercise the brain releases endorphins, the chemicals that help improve our mood.
Step-by-step explanation:
- Regular exercise benefits us to be more alert and active by delivering a substance that enhances the overall mood of a person.
- This substance is called "endorphin".
- Also, it improves blood flow and stimulates the heart.
- More oxygen would be in your brain and blood supporting you to be more alert and vigilant.
- Regular physical activity can develop your muscle power and boost your stamina.
- Exercise transports oxygen and nutrients to your tissues and helps your cardiovascular system functioning more efficiently.
- And when your heart and lung health advances, you have more energy to tackle daily tasks.