Seasons are celebrations.
   A year's a Ferris wheel.
   Both honor our world's habit
   of spinning 'round a star.

Which one of the following sentences best expresses the main idea of this poem?

A. The world has a habit of spinning around.
B. There are four seasons in a year.
C. Seasons are celebrations, while a year on Earth is a habit.
D. Seasons and Ferris wheels are like Earth's journey around the sun.