Here's why:

* Oxygen's boiling point: Oxygen's boiling point is -183 degrees Celsius. This means that at temperatures below -183 degrees Celsius, oxygen will be in a liquid state.

* -250 degrees Celsius is much colder: -250 degrees Celsius is significantly colder than oxygen's boiling point.

* Oxygen at -250 degrees Celsius: At -250 degrees Celsius, oxygen would be in a solid state, also known as "solid oxygen."

Let me know if you have any other questions!