Final answer:
The c. atmosphere is the sphere composed of gases such as nitrogen, oxygen, and carbon dioxide, essential for controlling the Earth's climate and supporting life.
Step-by-step explanation:
The sphere that is primarily composed of gases, including nitrogen, oxygen, carbon dioxide, and others, is the atmosphere. This layer of gases surrounds the Earth and is composed of roughly 78% nitrogen (N₂), 21% oxygen (O₂), and 1% other gases such as argon (Ar), with traces of water vapor (H₂O), carbon dioxide (CO₂), and various other gases. The atmospheric composition and the presence of these gases play a crucial role in maintaining life by controlling the Earth's temperature and weather patterns.
The atmosphere is primarily composed of gases, including nitrogen, oxygen, carbon dioxide, and others. It is the gaseous layer that surrounds the earth and marks the transition between its surface and space. The atmosphere consists of a mixture of gases, with nitrogen being the most abundant at 77 percent, followed by oxygen at 21 percent. The small amount of carbon dioxide is a critical component in the control of the earth's temperature.