Question: In Alaska, there are fewer hours of daylight in the winter than in the summer. Which statement best explains why this difference occurs?

  Options: 
 A. The Sun burns hotter in the summer.
 B. The Sun moves below the horizon in the summer.
 C. The Northern Hemisphere is closer to the Sun in the winter.
 D. The Northern Hemisphere is tilted away from the Sun in the winter.
Answer: D