Final answer:
Nitrogen, comprising 78% of the atmosphere, is vital for life processes.
Explanation:
Nitrogen (N₂) is the atmospheric gas described in the question, making up approximately 78% of the Earth's atmosphere. Nitrogen is crucial for living organisms as it is utilized in the production of amino acids, proteins, and nucleic acids.
Learn more about Atmospheric gases here:
https://brainly.com/question/28310375
