The direct source of energy to move the sailboat is probably wind, since wind is what pushes the sail of the sailboat, which is what propels the sailboat forward.
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Answer:
A. is repeated many times to ensure that the results are accurate
Explanation:
A controlled experiment is repeated many times to ensure that the results are accurate
Answer:
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The animals who live in those habitats have adjusted to the local temperature so changing the climate drastically, may upset the living organisms there:)