Why after heavy rain on the surface of the soil can you see many earthworms?

An increase in soil moisture and temperature worsens its aeration (oxygen supply), therefore, after rain, the worms crawl to the surface.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.