Which type of organism is described by the functions listed below?

1. provides shelter
2. provides oxygen
3. removes carbon dioxide from atmosphere

the organisms are not adapted to live in some communities or habitats.

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.