According to Neo-Darwinism, natural selection operates through

Options :
  1. fighting between organisms
  2. killing the weaker organisms
  3. differential reproduction
  4. variations
Answer and Explanation :-

Answer: Option 3

Explanation:

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Day after day, day after day,We stuck, nor breath nor motion As idle as a painted shipUpon a painted ocean.
-Samuel Taylor Coleridge The Rime of the Ancient Mariner