Question

From which of the following structures does a flatworm expel solid waste?

cloaca

vesicle

pores in skin

mouth

Answer 1

Mouth

Step-by-step explanation:

I took the k12 quiz. you can view the image below to confirm.

Answer 2

A flatworm expels solid waste through the structure known as mouth.
Flatworms only have one digestive opening, meaning that their mouth also serves as their anus - there is a single opening through which they eat and expel unnecessary materials.
Flatworms don't have a cloaca and vescile, and pores are too tiny to expel solid waste through them.