Final answer:
The atmosphere behaves as a system by undergoing circulation driven by seasonally changing deposition of sunlight and redistributing heat from warmer to cooler areas.
Step-by-step explanation:
The atmosphere is the gaseous layer that surrounds the Earth and marks the transition between its surface and space. It is composed primarily of nitrogen which is 77 percent, oxygen which is 21 percent, and minor elements which is 1 percent such as argon, helium, carbon dioxide, and water vapor.
In addition to this, the atmosphere has a structure consisting of the troposphere, stratosphere, mesosphere, and ionosphere. It behaves as a system by undergoing circulation driven by seasonally changing deposition of sunlight and redistributing heat from warmer to cooler areas. Furthermore, the atmosphere acts as a protective shield, filtering harmful ultraviolet (UV) radiation from the Sun and preventing it from reaching the Earth's surface in excessive amounts.