Why do earthworms come to the surface after a heavy rain?

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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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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