Which of the following is true about mammals? A All mammals are found only in land. B The duck-billed platypus is a mammal that lay eggs.
C There are no mammals that can fly.
D Mammals are always found in large groups.

B The duck billed platypus is a mammal that lay eggs

Explanation:

Because some mammals do fly. Mamals aren't always found in large groups. Mammals are also found in water . So the correct answer is B

dude you should crop your image so only the question shows. but   can you explain it better

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