Lichens and algae I believe
They are designed to help farmers of varying experience levels profitably and sustainably raise and sell meat, eggs, milk, and fiber with an emphasis on pasture-based systems.
Breathing is a process to move air in and out of a system. In addition, this process may also result to loss of water. This insensible loss is from the evaporative loss from the respiratory tract. This accounts for 10% to 20% of the water.
Pretty sure the answer is oxygen, as it is produced in photosynthesis and consumed in respiration.
