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Answer:
Nitrogen (N)
Explanation:
Nitrogen currently is the most abundant gas in Earth's atmosphere, composing around 80% of the air, followed by Oxygen and Argon (which is by the way a noble gas that does not interact with other elements), and in even smaller amounts other gases such as methane (which is a greenhouse gas).
This interesting combo of elements allows life on Earth to be possible, preventing solar radiation from reaching the soil with full intensity and also allowing the Earth to be warm, creating the perfect environment for life. In previous stages of the History of Earth, the balance of gases was constantly changing, which caused several extinction events due to climatic reasons until it reached a form of equilibrium and allowed more evolved and complex forms of life on Earth.
Learn more about abundant gases on Earth's atmosphere here: https://brainly.com/question/20594354