Question

cnidaria - shape of life
what cells control cnidarian movements?
blood cells
muscle cells
skin cells
nerve cells

Explanation:

Cnidarians have nerve cells that help in coordinating their movements. Muscle cells are involved in the actual contraction and relaxation for movement but nerve cells control the process. Blood cells in cnidarians (if present in a simple form) are more for transport of nutrients etc. Skin cells are for protection and not movement control.

Answer:

Nerve cells