​All changes in the weather are caused by ________.​

Correct option is D

The correct answer is Sun.

• All changes in weather are ultimately caused by the sun.
• It provides the energy that drives atmospheric processes.
• The sun's energy heats the Earth's surface, which in turn causes changes in temperature, pressure, humidity, and air movement.

Additional Information

• Pressure:
  ○ Differences in air pressure are caused by uneven heating of the Earth's surface by the sun.
  ○ It leads to the formation of high and low pressure systems that influence weather patterns.
• Humidity:
  ○ The sun's energy causes water to evaporate from the Earth's surface.
  ○ Leading to variations in humidity levels that affect weather conditions.
• Air:
  ○ The sun's energy heats the air, causing it to rise and creating convection currents that influence the movement of air masses and ultimately determine weather patterns.