Question

Suggest a reason why a whale is classified as a mammal like an elephant

Answer 1

It's because they give birth to live animals, it wouldn't be considered a mammal if it gave birth to a baby whale that was in an egg.

Way more simpler than his

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Answer 2

The biological act of giving birth to their offspring like other land mammals  shows that whales are mammals. Whales are also warm-blooded, breathe air through lungs, and produce milk for their offspring.