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Answer:
However, punctuated equilibrium is any sudden, rapid change in a species and can also be the result of other causes, such as <u>huge and sudden changes in the environment that result in more rapid changes in the organisms through harsher selection.</u>
The only living thing that makes its own food is the plant. So the first step in a food chain is always a plant that makes its own food by sun. :)))
I hope this is helpful
have a nice day
