Answer:
A. A scientific explanation for a set of observations that can be tested.
Explanation:
Theories can be proven or rejected, just like hypotheses.
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Humans have used artificial selection or selective breeding by breeding the wolves with the desirable traits together to create offspring who will most likely have both of the desirable traits the parents had.
Surface tension of water is 72 dynes/cm<span> at 25°C . It would take a force of 72 dynes to break a surface film of water 1 cm long.
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