No, it's just how it was formed. But if you untilted it now a lot of Earth's properties would change. For example, there would be no change in daylength throughout the year. This might affect things like the migration of birds.
You would also have no seasons. At each latitude, the climate would be consistent
throughout the year. That would probably upset a few things, since the annual cycle
of most plant species, and the reproductive cycle of most birds and small animals,
is tied to the seasons. Almost as if they evolved to their present forms in response
to the presence of seasons.
Because Earths axis is tilted.
There would be no four seasons if the earths axis was not tilted.
Earth is tilted from it axis
Seasons And Climate
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
The Earth's magnetic field is tilted about 11.5 degrees from the Earth's axis of rotation (i.e. its geographic axis).
The Earth's axis of rotation is tilted 23.44 degrees from the plane of the ecliptic.
the earth would be weird.
south
The season
without the tilted axis the whole planet would be impossible to live on since this angle is a state of equilibrium