Answer:
Carbon films
Step-by-step explanation:
The Gastropod class is the largest class of mollusks, including living and fossil species. The class has fossil records since the beginning of the Cambrian period, and are considered the most successful class of mollusks in terms of evolution in the environment, as they have conquered the marine, freshwater, and pulmonary snails and several other groups, the medium. terrestrial, and they succeeded in converting the cavity of the robe into a lung.