Answer :
The part of the theory of Evolution by Natural Selection is, new generations are better suited to survive than previous generations.
What is natural selection?
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype.
It describes the survival of individual species due to some adaptive features which enhances reproduction.
Thus, the part of the theory of Evolution by Natural Selection is, new generations are better suited to survive than previous generations.
Learn more about natural selection here: https://brainly.com/question/23929271
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