Answer:
The correct answer is : photosynthesis (between plant and the atmospheric CO2) and cellular respiration (between deer and the atmospheric CO2).
Explanation:
1. photosynthesis
Plants and photosynthetic organisms such as few bacteria and algae in the presence of sunlight to combine carbon dioxide (C02) from the atmosphere with water (H2O) to form food in the form of sugars/carbohydrates. These end products of the process store energy. This process is known as photosynthesis.
2. Cellular respiration
It is a somewhat inverted process of photosynthesis as cellular respiration requires oxygen and releases CO2 in the atmosphere. It is the released oxygen that is used by most other organisms for cellular respiration