Which of the following statements describes one of the key decisions for personal safety while exercising?

It could be to avoid injuries.  One reason why there are several rules in exercising is to ensure that a person will not get injured during a workout.  Injuries can occur when one is either handling too much weight, doing the exercise wrong, not using proper equipment or does not have a partner or trainer assisting him.

either two or three

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.