Question

Respiration: Biotic process :: Combustion: ___________ Nitrogen cycle Oxygen cycle Carbon cycle Abiotic process​

Answer 1

Explanation:

Biogeochemical cycles

Biotic processes Abiotic processes

Carbon Cycle Release of oxygen and CO

2

through photosynthesis and respiration respectively. Release of CO

2

in the atmosphere by burning of fossil fuels, wood, etc.

Oxygen Cycle Release of O

2

through photosynthesis and its consumption in processes like respiration etc. Photodissociation of water vapour in the upper atmosphere, as a result of which oxygen is released when water molecules are split by light

Nitrogen Cycle Nitrogen fixation, nitrification, ammonification Nitrogen fixation in atmosphere and denitrification