Answer: it can be considered a genetic mutation with a history of a Golden Retriever in their blood but it is very rare. and there our some black retrievers you can buy too. i hope i helped
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Answer:
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If i'm not wrong and late it might be F
Yes. sound waves are produced by energy.
Answer:
b
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imagine urself on an elevator dont you feel lighter
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hmmmmm ill get back later
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