In the given options, the correctly labeled energy transformation path is:
Unequal heating of the earth (thermal energy) --> wind (mechanical energy) --> wind moving turbine in windmill (mechanical and electrical energy).
Explanation:
1. Unequal heating of the earth generates thermal energy due to variations in temperature across the Earth's surface.
2. This thermal energy causes the air to move, creating wind which is a form of mechanical energy.
3. The wind then turns the blades of a turbine in a windmill, converting the mechanical energy of the wind into both mechanical (rotation of the turbine) and electrical energy (generated by the turbine and collected as electricity).
This transformation illustrates how energy changes from one form to another, starting with thermal energy from the sun and ending up as electrical energy that can be used to power homes and businesses.
