Question

why do earthworms come out of the soil when it is rain​

Answer 1

Answer:An earthworm breathes oxygen by absorbing it through its moist skin. It likes damp soil, but if the rain is very heavy, the oxygen in the water-logged soil may run out. Then the worm has to come up into the air to breathe. On top of the wet ground, the worm can breathe and wriggle along.

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Explanation:

Answer 2

Answer:

Earthworms come on land after the rain:- so that they can move over land.The temporarily wet conditions give worms a chance to move safely to new places.**Since worms breathe through their skin, the skin must stay wet in order for the Oxygen to pass through it.** So it gives them an opportunity to move greater distances across the soil than they could do through soil. Hope it will be helpful.