I'd say
B. Contour Farming
since it's planting on a flat surface and creating w/ridges to help prevent water from taking the crops away
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c. thyroxine </span><span>The thyroid releases too much of the hormone thyroxine, which increases the person's basal metabolic rate.</span>
False it isn't possible for that to happen and make an exact same copies
Many animals travel in packs or herds to increase chance of survival. This type of adaptation would be classified as behavioral