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ahoba wrote
Michael,
If you say that some origin hens sat on her eggs, you have still not answered my question! Why did some origin hens sit on their eggs? or in general, why did origin hens protect their eggs? what was the feeling link between hens and their eggs?
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Why did they protect their eggs? Why do you think? Dangers like environmental factors and predators most likely.
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Is it clear? See my question is not regarding evolution and ....
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Maybe, but the answer is still evolution and natural selection.