The scuba diver is a living system. The scuba gear or self- contained underwater breathing apparatus, is a system of air exchange. How are these two systems interacting? What are inputs and outputs of these systems

The carbon dioxide is the output and oxygen is the input of the Scuba apparatus.

Explanation:

The scuba apparatus is a life saving apparatus used by the sea divers. It recycles the exhaled gas and removes the carbon dioxide and compensates for the utilized oxygen gas before the diver is actually supplied with the gas for the purpose of breathing in a circuit. Hence, the carbon dioxide gas is the output and the oxygen is the input.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

c is the correct answer hope this !