Worms are neither insects nor amphibians. They belong to a completely different group of animals known as annelids. Annelids are segmented worms, which include earthworms, leeches, and marine worms.
Insects, on the other hand, are part of the arthropod group, characterized by their exoskeleton, segmented bodies, and jointed appendages. Amphibians are a class of vertebrates that include frogs, toads, salamanders, and newts, which typically live both in water and on land during different stages of their life cycle.
Worms, particularly earthworms, play a crucial role in the ecosystem by aerating the soil and breaking down organic matter, which helps in nutrient cycling. Unlike insects and amphibians, worms do not have legs, wings, or a backbone. They move by contracting and relaxing their muscles in a wave-like motion.