Final answer:
The process of carbon sources and sinks involves CO2 being removed from the atmosphere via photosynthesis and O2 being returned to the atmosphere via cellular respiration.
Step-by-step explanation:
When thinking about carbon sources and sinks, the process involves CO2 being removed from the atmosphere via photosynthesis and O2 being returned to the atmosphere via cellular respiration. During photosynthesis, plants use carbon dioxide from the atmosphere along with sunlight and water to produce glucose and release oxygen. On the other hand, cellular respiration is the process by which organisms break down glucose to produce energy, resulting in the release of carbon dioxide back into the atmosphere.
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