Plankton -- microscopic marine plants -- help remove carbon dioxide from the air, and provide the ultimate food source for most creatures in the ocean's food chain.
(Plankton; help remove; carbon dioxide; from the air) (Plankton; provide; the ultimate food source; for most creatures in the ocean's food chain)
Plankton Plankton
help remove provide
carbon dioxide from the air
the ultimate food source for most creatures in the ocean's food chain