Celeste needs to improve her cardiorespiratory health. which of the following activities would most benefit her heart, and why? brisk walking, because it is aerobic with a long duration bowling, because it is anaerobic with a short duration rowing, because it is anaerobic with a short duration weight lifting, because it is aerobic with a long duration

Explanation:

Exercises that help to improve cardiorespiratory health are aerobic ones, because this type involves oxygen as a principal source of energy, which requires to breath well. Aerobic exercises are long but low intensity because don't require weightlifting or related. Actually aerobic means "with oxygen".

In this case, brisk walking is the right answer because is an aerobic activity which is centered in oxygen, which will help to improve cardiorespiratory system. The counterpart of this exercise is anaerobic which is without oxygen,  these are high intensity and pressure exercise like weightlifting.

you would need to check her bp before and after her activity.