Explanation:
Well the human body cells are the basic units of life. Which one thing is that a group of our cells that be working together it's rather for a specific function form of tissues. Organs are two or more of the tissues that work or perse operate together as buddies. Also they separate as organs work together forming body systems.
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According to uniformitarianism, (C) the rate of geolgic processes remain the same over time, and the processes themselves remain the same.
The answer is Denitrification.
Denitrification is the reduction of nitrates back into the largely inert nitrogen gas (N2), completing the nitrogen cycle. This process is performed by bacterial species such as Pseudomonas and Clostridium in anaerobic conditions.