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D. Animal is is the answer.
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Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
Answer:
-4 is greater than -6 because it's closer to being a positive number than -6 is
Sun heat highly temperature. water was can vapor atmosphere