Here's a problem to solve: Which of the following statements best explains why it is warmer at the equator than at the North Pole?

Among the 4 following options, which is the correct answer?

- A: The equator has a larger area than the North Pole.
 
- B: The equator is closer to the Sun than the North Pole.
 
- C: The equator receives more direct sunlight than the North Pole.
 
- D: The equator has more hours of daylight per year than the North Pole.
 