Animals, including humans, take in o2, and breath out co2 in respiration. increasing the population leads to less o2 and more co2 in the atmosphere. is this a positive feedback loop, negative feedback loop, neither, or no answer provided?

Negative feedback loop

Explanation:

For cellular respiration, almost all the living cells require O₂ (oxygen) and release CO₂ (carbon dioxide). The same CO₂ is used in the photosynthesis by chlorophyll-containing cells and O₂ is released in the process as a byproduct. Increasing population require more oxygen O₂ for the cellular respiration But reducing the number of plants due to deforestation and urbanization, the concentration of CO₂ increasing in the atmosphere.

Thus increasing the population leads to less O₂ and more CO₂ in the atmosphere is a negative feedback loop.