Causes of origin of new species is

Options :
  1. mutation ans selection
  2. reproductive isolation
  3. hybridization and variation
  4. all the above

Answer and Explanation :-

Answer: Option 4


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The same wind that uproots treesmakes the grass shine.The lordly wind loves the weaknessand the lowness of grasses.Never brag of being strong.The axe doesn't worry how thick the branches are.It cuts them to pieces. But not the leaves.It leaves the leaves alone.
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