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Answer:
Plants, animals and, fungi.
Explanation:
Through the process of ecological succession in the development of vegetation in an area over time, have reached a steady state.
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The correct answer is A, parathyroid gland.
The parathyroid hormone is secreted by the parathyroid gland which <span>inhibits osteoblasts, stimulates osteoclasts,</span> reduces the calcium output by the kidneys and promotes absorption of the calcium by the small intestines. Calcitonin, secreted by the thyroid gland, also works to a similar effect.
