Question

Why are there four seasons?

Answer 1

     The reason there are four seasons is that the earth is tilted 23.5 degrees on its axis. For half the year, this tilt causes one half of the earth to tilt toward the sun while the other half tilts away. This changes every six months, creating the seasons.

Answer 2

We have seasons because of our planets axis of rotation. Or in other words, the scientific word for this is obliquity . The earth is tilted at the angle of 23.5 degrees.  

Hope this helps! :)