Question

multiple choice question
a muscular foot, visceral mass, and a mantle are body regions common to all

o mollusks.
o roundworms.
o annelids.
o flatworms.

Explanation:

Mollusks have a muscular foot (used for movement), a visceral mass (contains internal organs), and a mantle (secretes the shell in many mollusks). Roundworms (Nematoda) have a simple cylindrical body. Annelids (like earthworms) have segmented bodies. Flatworms (Platyhelminthes) have a flattened body.

Answer:

mollusks.