How might an earthworms lack of appendages be an adaptation to burowing?

An earthworm's lack of appendages is an adaptation that enhances its ability to burrow through soil. The streamlined, elongated body allows it to move efficiently through tight spaces, reducing resistance as it pushes through the earth. This body shape also minimizes the chance of getting snagged on obstacles in the soil, enabling the worm to navigate its environment effectively while aerating the soil and facilitating nutrient cycling.