Answer: Crunches target the rectus abdominis and other abdominal muscles. An ab crunch machine is designed to strengthen the abdominal muscles. Wearing compression underwear can give the stomach a more toned appearance. Ab crunches are a great exercise for people looking to shed weight
Explanation:
A is the correct answer.
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The answer is A, the immune system
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Yoga can help a person be more aware of their breathing, balance, etc. and help with strength and flexibility.
