In which sealed container would the organisms be able to continuously cycle o2 and co2 gases?

a. a terrarium with mice and wood shavings
b. an aquarium with fish and plastic plants
c. an aquarium with water plants and a snail
d. a terrarium with a frog and a pool of water

The correct answer is C.
In the aquarium, the water plants would provide the O2 molecules necessary for the snail's metabolism and the snail would release the CO2 molecules that are a byproduct of his metabolism into the container. The CO2 would later be used by plants to make sugar in the process of photosynthesis, releasing more O2 and the cycle of two gases would be completed.

Ais the correct answer