Question

phylum platyhelminthes
structures, along the undersides of rocks and surfaces in their environment.
what feature allows planarians to move along the underside of rocks and other surfaces?
slime
cilia
flagella

Explanation:

Planarians move along surfaces using cilia, which are hair - like structures that beat in coordinated patterns to propel them. Slime is not their main locomotion feature and flagella are not present in planarians for movement in this context.

Answer:

B. cilia