Osteoporosis is a disease that affects the bones and leads to an increase in bone fractures. Osteoporosis is most likely to be affected by which cycle?

Osteoporosis weakens bones, which are built largely from calcium and phosphate minerals. Phosphorus is part of phosphate, so the phosphorus cycle is most directly connected to the minerals that help form bone. Therefore, the phosphorus cycle is the best choice; magnesium, water, and nitrogen cycles are less directly related to bone structure.

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