Multiple choice general knowledge

Which organism is helpful in making the soil fertile?

  1. Beetle

  2. Ringworm

  3. Roundworm

  4. Earthworm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Earthworms improve soil fertility through burrowing, which aerates the soil and enhances water infiltration. Their digestive process converts organic matter into nutrient-rich castings (vermicast) that boost soil nutrient content and structure. Beetles and roundworms don't contribute to soil fertility in the same way, while ringworm is actually a fungus that causes infection.

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