Earth has a moon Earth has a tilted axis Earth has a magnetic field Earth has an elliptical orbit
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the MAJOR reason Earth has seasons?
Possibilities:
- Earth has a moon
- Earth has a tilted axis
- Earth has a magnetic field
- Earth has an elliptical orbit

Earth has a tilted axis