Final answer:
The jet stream is responsible for circulating hot and cold air in the atmosphere, causing local weather systems. Option B is correct.
Step-by-step explanation:
The correct answer is jet stream (option B).
The jet stream is a narrow, high-speed current of air in the upper atmosphere. It flows in a wavy pattern from west to east in both the northern and southern hemispheres. The jet stream is responsible for circulating hot and cold air in the atmosphere, which in turn causes local weather systems.
For example, in the northern hemisphere, warm air from the tropics flows poleward while cold air from the poles flows equatorward. The interaction between these air masses, influenced by the rotation of the Earth, creates the jet stream and drives weather patterns. The jet stream can bring warm air, cold air, storms, and other weather phenomena.