At some point, categories like herbivore/parasite/predator break down. (for example, small insects that eat small amounts of large plants, over a long time, seem to conform to the definition of a parasite.) why is this?

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!