Even a small change in tilt of the earth's axis would have a profound change in the earth. It would change the length and temperature of our days and seasons. Depending on the angle of tilt, it would melt the polar ice caps or it would lower the earth's temperature causing polar ice caps to increase in size. This in turn would increase or decrease the level of water in the oceans, all of which would dramatically influence our weather.
Some organisms would go extinct because they could no longer survive in new environment; and others would go extinct because they depend for survival on the organisms that have gone extinct.
Many plants would become extinct as well, affecting the food supply of the entire planet and every living soul.
It is quite possible all life as we know it could cease to exist if the earth's tilt were to change. It is also quite possible that new life forms could come into being that could have a positive effect or a disastrous effect on earth's systems.
Even a very "small" change in world tilt would have profound implications.
There are two things that cause it which are the earths orbit and thetilt of the earths axis.
north pole
The earths tilt at its axis
The actual most important cause of Earth's seasons is it's axis.
Well the earth has an imaginary axis going from pole to pole through the middle of the earth called the axis of rotation. This axis is tilted with respect to the orbital plane of the Earth around the Sun. This tilt is the cause of the seasons which are most noticeable far from the equator.
That would most likely cause a very small change in the seasons.
Because it tilts on its axis
Climate
There are two things that cause it which are the earths orbit and thetilt of the earths axis.
intersect
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.
Actually, it doesn't. The TILT of the Earth on it axis causes seasonal changes.
1. Tilt of earths axis 2. Earths axis remains parallel throughout its yearly orbit.
The earth's axis is imaginary, and it doesn't cause anything. You have a ball that's spinning without wobbling, and as you watch it spinning, you mentally imagine that it's spinning on a pencil that has been stuck through it. The imaginary line that runs up the center of that imaginary pencil is called the axis of rotation.
Seasons
north pole
The earths tilt at its axis