The cells working together in the leaves make sure that the plant exchanges oxygen for the carbon dioxide that the plant needs to survive.
(The cells; working together; L:in the leaves) (the carbon dioxide; needs; to survive) Context(the carbon dioxide needs,List([87, 126))):(the plant; to survive; )
the carbon dioxide needs,List([87, 126))
The cells the carbon dioxide the plant
working together needs to survive
L:in the leaves
to survive