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What is food chain?

  1. A human made chain
  2. The supply of food in market
  3. The process of making food
  4. A chain in which one animal eats other animal

Answer: A chain in which one animal eats other animal

Long Answer:

Food chain is a series in which one animal eats the other animal. A food chain looks like this one: 

Grass → Grasshopper → Frog → Snake → Eagle

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