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Dolphins are mammals that live in the ocean. Mammals are different from fish, reptiles, or birds. As mammals, dolphins breathe oxygen, even though they live in water. Because it is a mammal, a dolphin mother gives birth to a live baby, unlike reptiles and birds, which lay eggs. A dolphin mother also feeds her baby milk like other mammals.

What is the main idea of this passage?

User Guillem Gelabert
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Answer:

dolphins are mammals. :)

User Kadiatou
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