Final answer:
Health-related components are the key factors that promote total health and prevent diseases related to physical activity, with physical activity contributing significantly to various aspects of health. The correct option is B.
Step-by-step explanation:
The components that promote total health and prevent the onset of diseases and problems associated with physical activities are B. health-related components. These include cardiovascular fitness, muscle strength, endurance, flexibility, and body composition.
Engaging in regular physical activity increases cardiovascular and muscular fitness, improves bone density and strength, improves cognitive function, and helps in maintaining a healthy weight. A balanced diet, alongside exercise, provides essential nutrients and contributes to overall health and wellbeing. The correct option is B.