Using oxygen, glucose and fatty acids in varying proportions during aerobics.*1 pointA. PHYSICAL ACTIVITY AND DURATIONB. ENERGY PRODUCTIONC. AEROBIC CAPACITYD. CARDIO RESPIRATORY ENDURANCE

It seems like you're asking for an explanation of how oxygen, glucose, and fatty acids are used in aerobic exercise and how this relates to physical activity and duration, energy production

It seems like you're asking for an explanation of how oxygen, glucose, and fatty acids are used during aerobic exercise and how this relates to physical activity and duration, energy production, aerobic capacity, and cardiorespiratory endurance. Here's a step-by-step explanation:

A. Physical Activity and Duration: During physical activity, your body needs energy. The duration and intensity of the activity will determine how much energy is needed and what sources it will come from. For short, intense activities, your body will primarily use glucose for energy. For longer, less intense activities, your body will use a mix of glucose and fatty acids.

B. Energy Production: Glucose and fatty acids are broken down in the presence of oxygen to produce energy in a process called aerobic metabolism. Glucose is broken down into pyruvate through a process called glycolysis