Answer: The question is incomplete,below is the complete question.
Which of the following refers to an organism that has the following characteristics: Elongated marine worms that live in a chitinous tube that they secrete; the tube is often buried in the ground so that only the lophophore sticks out, and the lophophore contains numerous tentacles?
A) Bryozoan
B) Phoronid
C) Mollusk
D) Annelid.
The correct answer is option D
Phoronid
Explanation: A Phoronid is a small aquatic animal that filter it's food with a crown of tentacle known as lophophore, A Phoronid body is soft so it builds special structures to support and protect the body,these structures are in form of upright/standing tubes made of chitin (a fibrous substance consisting of complex sugar, polysaccharides).
Phoronids are sometimes known as horseshoe worms and they are found in abundance in shallow marine sediments.
Phoronids are unsegmented and are of member of the invertebrate phylum phoronids.
