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The proper answer to this question that it "can take more than <span>thousands of years for the process to be completed"!
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The correct answer would be D, gravity. As moving water will cause rocks to erode as well as wind, and animal habitation.
Answer: Compact bone is dense and composed of osteons, while spongy bone is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish and innervate bones.
Explanation: Sup. Hope dis helps u
