According to the evolutionary theory, formation of a new species is generally due to

Sudden creation by nature

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Accumulation of variations over several generations

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Clones formed during asexual reproduction

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Movement of individuals from one habitat to another

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Solution

The correct option is B Accumulation of variations over several generations
Accumulation of variations over several generations is one of the major factors responsible for speciation. There are several other forces also acting but most important is the accumulation of variations for several generations. This ensures that variations are in accordance with the environmental conditions throughout.

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