The Earth revolving around the Sun causes the seasons to change on its axis, and gold, scarlet, and auburn leaves make a mosaic of rich colors heralding seasonal change. Given these facts, what factor is instrumental behind the change of leaf colors during the year among the following options:
- organisms and their habitat
 - global warming
 - Earth orbiting the Sun
 - Solar energy
 - scattered light
 - Greenhouse gases
 - Varying light output from sun
 - Moon orbiting the Earth


 

   Earth orbiting the Sun      