Answer:
Nematodes, also known as roundworms, move using a unique mode of locomotion called "whip-like" movement. This involves the contraction and relaxation of longitudinal muscles on the nematode's body, causing it to move forward in a wave-like motion.
In contrast, snakes and eels move by undulating their bodies in a lateral or serpentine manner. They use their body muscles to push against the ground or water, generating a forward thrust that propels them forward.
Therefore, the key difference between nematode movement and the movement of snakes or eels is the method by which they move. Nematodes move in a whip-like motion, while snakes and eels use undulating or serpentine movements to move forward.
Step-by-step explanation: