Concept:Winds are caused by differences in air pressure, which mainly result from uneven heating of the Earth's surface and oceans.
Explanation:The Sun heats the Earth unevenly because of its curvature and tilt. Equatorial regions get more direct sunlight and become warmer than the poles. This creates low pressure where warm air rises and high pressure where cool air sinks. Air moves from high to low pressure, generating wind.
Oceans and land heat and cool at different rates. Land heats faster during the day, creating low pressure over land and high pressure over the sea, causing sea breezes. At night, the opposite happens, producing land breezes. These local winds also contribute to global wind patterns.
The distance between Earth and the Sun does not change enough in the short term to affect daily wind patterns. Gravitational force holds the atmosphere but does not directly push air to create wind.
Therefore, only uneven heating of the Earth and uneven heating of the oceans are the primary factors.
Answer:A. (a) and (b)