Mars, earth
Earth
It's because of how far away from the sun they are and what axis the planet is on.
The Earth has seasons because it polar axis is tilted relative to its orbit.
There is more than one planet that has not tilt. The planets are Mercury, Venus, and Jupiter. The planet's also do not have seasons.
its earths tilt on its axis orbiting the sun
Uranus has at least 27 moons. It is the seventh planet from the Sun and is known for its tilting axis which causes extreme seasons.
The tilting of the Earth on its axis exposes the planet to different levels of sunlight, this in turn causes temperature variations and results in what is known as seasons.
earth
What causes Uranus extreme seasons is it's rotational axis
Seasons
As the earth spins on its axis, producing night and day, it also moves about the sun in an elliptical (elongated circle) orbit that requires about 365 1/4 days to complete. The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons.
Uranus and Pluto have a tilt and have extreme seasons. Mars, Saturn, and Neptune have seasons that are similar to ours.