I think the circulatory system is the best body system because we need the heart to stay alive, many people live with only one lung. but we need the respiratory system to let oxygen in, and let carbon dioxide out.
The right answer is Food and Nutrition program.
A nutrition program is a fixed-duration diet, it mentions the foods that must be taken at a specific time of the day. These programs are adapted for a specific purpose, such as bodybuilding, weight loss or even gain weight.
? post the list of choices
Answer: You can lift A dumbell one time.
Explanation: Doing this for one or 2 reps can demonstrate musular strength. any more than that is usually endurance. You can do deadlift or any heavy wights to show muscular strength
