The branch of science which deal with a living being is called biology.
The correct answer is B.
The formation of a new cell from the old cell is called cell division. The fusion of the two different gametes to form a new offspring is called fertilization.
The meiosis will lead to the cut of the chromosomal genes into half and make a new gene combination by crossing over.
The fertilization also leads to the fusion of two different gametes to form a new character.
Hence, the correct answer is B that is New gene combination.
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