Which aspect of health is affected by good nutrition?

Good nutrition is fundamental to overall health and performance because it influences multiple systems in the body simultaneously. Proper nutrition provides the essential nutrients that support growth, development, and maintenance of bodily functions. It is crucial for physical health, as it helps in maintaining an appropriate body weight, muscle mass, and energy levels. Furthermore, good nutrition significantly impacts mental health by influencing mood, cognitive function, and overall mental well-being through the provision of nutrients necessary for brain function.

In addition, nutrition plays a key role in enhancing immune response, which is vital for defending against illness and disease. By nourishing the body adequately, one can improve endurance, strength, and recovery from physical exertion, contributing to better performance in both everyday activities and athletic endeavors. Thus, good nutrition is not limited to just one area of health; it encompasses various aspects, making the answer "Overall health and performance" the most comprehensive and accurate choice.