Answer:
stomach
Explanation:
it is obious cause even 6 standard children know it
<span>C. generate a topic
Examining different writings could help you produce ideas.
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The answer would be appropriately shaped receptors
The answer is D. The natural selection is a theory which illustrates the gradual process of evolution in the population due to the change of environment. The key point is the mutation (variation) exists in the population before the environment changing. For C, if the environment does not change, though the adaptation is useful to environment, it will not be selected. Because the organisms without the adaptation will not die.
