Explain why gyms, sports, recreational centres
have rules?

Explanation:

this help sports clubs, players and parents deal with unlawful or inappropriate behaviour like abuse, harassment, unfair treatment, child protection issues, inappropriate touching of athletes and discrimination.

To keep people safe

Explanation:

Having guidelines in place can help assure you are safe when using the equipment. For example, a gym might have a rule to use a clip while you are running on a treadmill or only liift weights when someone is watching, these rules are in place to keep you safe.

answer 2 is the right one. jim should measure his snack to make sure he is using the right serving size.