Respuesta :
A they bend from side to side to move not sure
Answer:
Option A. They bend from side to side to move.
Explanation:
Roundworm belong to phylum Nematoda. Round worm use their back and forth movement to move in water. This back forth movement results in S-shaped curves results in side to side movement. This movement is similar to the movement of snake. I have attached a picture for better understanding.