Because of the tilt of the earth, the sun hits different spots of the planet, at different times. When the northern hemisphere is tilted words the sun, the US will have summer, because the area is closer to the sun. The climate will change, get hotter, colder, dryer, wetter, etc, because of the season, and the season changes due to the tilt of the earth.
Do you understang?
Seasons And Climate
There would be no four seasons if the earths axis was not tilted.
Earth is tilted from it axis
The axis of the Earth is tilted 23.5 degress from the plane of the orbit round the sun.
Yes it is tilted at about 23.5 degrees
Because of Earth's shape and the fact that it spins with a tilted axis as it orbits the Sun.
The Earth's axis of rotation is tilted 23.44 degrees from the plane of the ecliptic.
Because Earths axis is tilted.
south
The season
without the tilted axis the whole planet would be impossible to live on since this angle is a state of equilibrium
Mainly, there would be no seasons.