Answer:
The correct answer would be phylum Porifera.
Step-by-step explanation:
Poriferans are commonly referred to as sponges. Porifera body is cylindrical some of them are radially symmetrical, but most are asymmetrical.
Sponges show extraordinary ability to regenerate is exhibited not only by repair of lost parts or injured parts but also by the whole regeneration of a new individual from even single cells.
Thus, the correct answer is Porifera phylum.