Conclusion

The diagram below is a computer-generated image that depicts the positions of the Sun and Earth during each season. You can see that the Northern and Southern hemispheres of the Earth receives different amounts of light from the Sun during different seasons.

A diagram of the Sun and the Earth (not to scale) during each season

A diagram of the Sun and the Earth (not to scale) during each season
Seasons image from Wikipedia article , under Creative Commons  license. Created by user “Tau’olunga”.