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Which reason is not cause of natural fire in forests ?

  • A.Lightning
  • B.Rolling stones
  • C.Volcanic eruption
  • D.Spark from railway engine

Answer: D

The cause that is not natural is spark from a railway engine.

Natural forest fires are started by lightning, by sparks from rolling stones striking each other on dry slopes, and by volcanic eruptions. A spark from a railway engine comes from human activity, so it is a man-made (anthropogenic) cause.

Lightning, rolling stones and volcanic eruptions are all natural causes, so they are not the answer.

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