The leg curl exercise focuses on three areas of your body: at the back of your thighs, the thing part nearest to your knee and the calves. The muscles involve in these areas are the hamstrings, quads and calf muscles, respectively.
The answer i believe is d.
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Oxygen,carbon,nitrogen and hydrogen hope this helps
Answer:
forests maintain a balance between the amount of carbon-dioxide and oxygen gases in the atmosphere...
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