Hinduism is the answer
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I believe it is D. International date line, because the question holds the answer. When you say "Different days" it kind of gives the answer away.
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Answer:
oral tradition but not sure
Explanation:
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The western and eastern sierra nevada have substantially different species of plants and animals, because the east lies in the rain shadow of the crest. the plants and animals in the east are thus adapted to much drier conditions.