A bat is a mammal even though it flies in air why

Explanation:

Bats are classed as mammals, but as the only flying mammal, people often ask me why they are mammals and not birds. In this article, I look to find out whether they possess all the mammalian traits. Bats are mammals because they breathe air, give birth to live young, provide milk to their young, have fur, and are warm-blooded.

b. climate change will cause an increase in biodiversity of all ecosystems.

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i think the answer is a.keratin is the pigment responsible for skin color.