How locomotion occurs in an earthworm?

Locomotion in an earthworm occurs through a combination of contraction and relaxation of its circular and longitudinal muscles. When the circular muscles contract, the body becomes elongated and thinner, allowing the worm to move forward. Conversely, when the longitudinal muscles contract, the body shortens and thickens, anchoring segments to the soil and pushing the rest of the body forward. This coordinated movement, along with the secretion of mucus for lubrication, enables the earthworm to effectively burrow and travel through its environment.