Your teeth
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The concept of the struggle for existence<span> concerns the competition or battle for resources needed to live. It can refer to human society, or to organisms in nature. The concept is ancient, and the term </span>struggle for existence<span> was in use by the end of the 18th century. From the 17th century onwards the concept was associated with a population exceeding resources.
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STSN</span>
The answer to the question is PCR
Answer:
This movement is called plate motion, or tectonic shift
Explanation: