Final answer:
Uranus has the most extreme seasons due to its axial tilt of 98°, leading to 42 years of constant daylight followed by 42 years of darkness at each pole.
Step-by-step explanation:
The planet that has the most extreme seasons among the options listed is Uranus. This is due to its peculiar axial tilt of 98°, which essentially means Uranus rotates on its side relative to its orbit around the Sun. This tilt results in each pole experiencing 42 years of constant sunlight followed by 42 years of darkness. Unlike Jupiter, which has a tilt of only 3° and virtually no noticeable seasons, Uranus' extreme axial tilt makes its seasonal changes much more pronounced. Saturn and Neptune, with tilts of 27° and 29° respectively, also have seasons, but they are not as extreme as those on Uranus.