Which of the following terms beat describes air

a. element
b. compound
c. mixture
d. none of the above

It’s not a compound it’s a mixture so it’s Letter C Mixture

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.