What is the main source for the formation of wind?a.vegetationb.sunc.uneven landd.seasons

The main source for the formation of wind is the sun. Here's a step-by-step explanation:

1. The sun heats up the Earth's surface during the day. However, the heating is not uniform as land heats up faster than water.

2. The air above the land gets heated up and starts to rise, creating an area of low pressure.

3. Meanwhile, the air above water bodies remains cooler and thus, heavier. This creates an area of high pressure.

4. Air always moves from high pressure areas to low pressure areas. So, the cooler air rushes in to replace the rising warm air.

5. This movement of air from one place to another creates wind.

So, the correct answer is b. Sun.