You are presented with the question "What causes the westerlies?" and the following answer choices: 
- flow of electrons
 - Ocean currents
 - Precipitation
 - to move people
 - Drought
 - scattered light
 - Uneven heating by the sun
 - exposure to cold

Now knowing that unequal heating of Earth 's surface by the Sun causes global wind patterns and wind belts in the Atlantic Ocean include the trade winds and the prevailing westerlies , choose the best answer.


 

       Uneven heating by the sun  