A. dependance.
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Answer:This maybe correct
Explanation:
Mountain biodiversity faces a number of serious and growing challenges. Habitat degradation caused by unsustainable clearing of land results in erosion of fertile soil and increases the threat of avalanches, landslides and flooding. With this change in habitat, rare species of plants and animals can face extinction.
A becuaase you breathe in oxygen and you release carbon dioxide.
Calcium helps to maintain the strength of your bones and teeth, keeping them from becoming weak and brittle. Many dairy products contain a fair amount of calcium in them, including milk and cheese. Many vegetables also contain calcium without the high fat content, such as broccoli and kale.
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