Which of the following animals is correctly matched with its level of body organization, symmetry, and nature of coelom?

Step-by-step solution

Let us evaluate each option based on their classification: Fasciola (Platyhelminthes) exhibits an organ level of body organization, not organ-system level. It is bilaterally symmetrical and acoelomate. Ascaris (Aschelminthes) has an organ-system level of organization and bilateral symmetry, but it is pseudocoelomate, not coelomate. Pleurobrachia (Ctenophora) has a tissue level of organization and is acoelomate, but it exhibits radial symmetry, not bilateral symmetry. Nereis (Annelida) is correctly matched as it exh