The tilt of Earth's axis changes in a process called precession over a very long period of time. I'd say it's long-term.
The Earth's tilt is what causes the seasons.
Earth's axial tilt is 23.44°.
23.5 degrees
the has an axis and it spins on it axis 27 days so in the arctic region it may take 15 days long so that's short
Angle of inclination is a fancy term for earths tilt. So the angle of inclination is 23 1/2 %.
The earths tilt at its axis
Seasons
mostly climate
23.5 degrees
This is due ( in the northern hemisphere) to the tilt of the earths axis, which is toward the sun in late June and away from the sun in late December.
It basically maintains the direction of its axis, at least in the short term.
Earth's tilt is much older than that - it probably had its tilt for millions of years.