Grinding mollusks are used for respiration

The answer is: “False.” The correct answer is: “slugs are used nostrils in breathing".

Molluscs are the second largest phylum of invertebrate animals, and breathe by gills, mostly in aquatic species, and by lungs in terrestrial species, and sometimes through the mantle or outer ectodermal layer. This process helps them exchange oxygen and carbon dioxide in their bodies. Ground mollusks are also used in the feeding process because they are equipped with a radula, a rough tongue-like organ, which they use to scrape or grind up food particles. In addition, they secrete mucus from their feet to help move themselves along the substrate. Thus, grinding molluscs plays important roles in both respiration and feeding processes.