Question

earthworm can move on hard and rough surface how reason​

Answer 1

Answer:

Earthworms will move faster on a rough surface. This is because of higher traction on rough surfaces which helps their body to grip the surface. It becomes slower on a smooth surface because it's body does not get any grip with the Surface.

Answer 2

The surface doesn't matter to a earthworm.

It secrets a liquid from the bottom of it's body which makes the surfaces smooth and helps it stick