1. What component of health-related fitness when the heart and the lungs sustain oxygen to muscles for a prolonged period of time?
a. Cardiovascular fitness
c. flexibility
b. Muscular endurance
d. body composition

2. Which of the following refers to how hard or intense you do a physical activity, the level of difficulty of a physical activity became more intense over time?
a.time
b.Intensity
c.type
d.frequency​