Answer:
1 it doesn't have its own light
2 comet revolves around the sun and stars don't
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Answer:
D. The circulatory system transports oxygen that the respiratory system brings into the body.
Explanation:
the first two answers either refer to carbon dioxide as beneficial and necessary to the body(it sometimes is but not in this case)
the answer choice c refers to oxygen being transferred directly to the heart. This is also incorrect.
the only proper answer to this question is answer choice d.
Answer:the frequency decreases and the wavelength increases
Explanation:
The frequency decreases and the wavelength increases