Explain how biodiversity is affected by natural selection

Biodiversity is the variety of different species of organisms on Earth, or within an ecosystem.  High biodiversity is important. It make sure that ecosystems are stable becuase different species depend on each other for things like shelter and fodd. Different species can also help to maintain the right physical environment for each other (e.g. the acidity of the soil.)

Explanation:

they deliver oxygen to the blood

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