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(D) Darwin's theory of Natural Selection is based on several key observations: $1$. Overproduction of offspring. $2$. Struggle for existence (competit

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Discontinuous variations

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(D) Darwin's theory of Natural Selection is based on several key observations: $1$. Overproduction of offspring. $2$. Struggle for existence (competition for resources). $3$. Variations among individuals. $4$. Survival of the fittest (those best adapted to the environment survive). Darwin emphasized that variations are small and directional (continuous). He did not consider 'discontinuous variations' (mutations) as the basis for his theory,as he was unaware of the mechanism of inheritance at that time. Therefore,discontinuous variations are not part of his theory.

Which of the following is $NOT$ considered a part of Darwin's theory of Natural Selection?

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