which of these is the largest class in phylum mollusca, and includes freshwater, saltwater, and terrestrial…

which of these is the largest class in phylum mollusca, and includes freshwater, saltwater, and terrestrial organisms with single, spiraled shells?\nclass gastropoda\nclass bivalvia
Answer
Answer:
Class Gastropoda
Brief Explanations:
Gastropoda is the largest class in Mollusca, with freshwater, salt - water, and terrestrial forms having single, spiraled shells. Bivalvia has two - shelled organisms.