Question

16 the ability of the heart, blood, blood vessels, and the respiratory system to supply oxygen and resce a health - related fitness b cardiovascular fitness c physical fitness d skill - related fitness

Explanation:

To solve this, we analyze each option:

• Option A (health - related fitness) is a broader category including cardiovascular, muscular strength, etc. The question is about a specific system's ability, so A is not correct.
• Option B (cardiovascular fitness) is defined as the ability of the heart, blood, blood vessels, and respiratory system to supply oxygen during physical activity. This matches the description in the question.
• Option C (physical fitness) is a general term encompassing all aspects of fitness, not specific to the cardiovascular and respiratory systems' oxygen - supplying ability.
• Option D (skill - related fitness) relates to skills like agility, balance, etc., not to the oxygen - supplying ability of the cardiovascular and respiratory systems.

Answer:

B. cardiovascular fitness