We as humans need Nitrogen to survive. We breath 78 percent nitrogen and 21 percent oxygen
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Answer:
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Answer: The correct answer is : d. The "celestial sphere" is another name for our universe.
Explanation: The celestial sphere is an ideal sphere without a defined radius, which has the same center as the terrestrial globe, where the stars move. The directions in which the celestial objects are found can be represented by means of the sphere.
The answer is identifiable private information. A physical procedure which is the intervention by which information are gathered and manipulations of the subject or subject’s environment that are performed for the research while interaction includes communication between an investigator and the subject.