Question

which pathway adds carbon dioxide back to the atmosphere from living organisms? feeding fossilization aerobic cellular respiration photosynthesis by plants and algae

Explanation:

Aerobic cellular respiration is a metabolic process where living organisms (including animals, plants, and microorganisms) break down glucose (or other organic molecules) in the presence of oxygen. The chemical equation for aerobic cellular respiration is \(C_6H_{12}O_6+6O_2
ightarrow6CO_2 + 6H_2O+\text{energy}\). Carbon dioxide (\(CO_2\)) is a by - product of this reaction and is released back into the atmosphere.

Feeding is the process of consuming food (organic matter) by an organism. It is part of the transfer of organic carbon from one trophic level to another in a food chain or food web, but it does not directly add \(CO_2\) to the atmosphere.

Fossilization is a long - term process where dead organisms are transformed into fossils (such as coal, oil, or natural gas over millions of years). This process sequesters carbon rather than adding it back to the atmosphere in the short - term.

Photosynthesis by plants and algae is the process of taking in \(CO_2\) from the atmosphere (along with water) and using sunlight to convert it into glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)). The chemical equation is \(6CO_2+6H_2O+\text{sunlight}
ightarrow C_6H_{12}O_6 + 6O_2\). So, it removes \(CO_2\) from the atmosphere rather than adding it.

Answer:

Aerobic cellular respiration.