Question

cardiorespiratory endurance exercises involve:
o weight lifting
o large - muscle groups
o stretching
o small - muscle groups

Explanation:

Cardiorespiratory endurance exercises aim to improve the function of the heart and lungs. They typically involve continuous, rhythmic movements of large - muscle groups to increase heart rate and breathing rate over an extended period. Weight lifting is more for strength training, stretching is for flexibility, and small - muscle groups are not the focus of cardio exercises.

Answer:

large - muscle groups