Hi Sherry, 

In the example you quote the clear reason why the person chose to go skiing is because the activities are more ....so 'parce que ' is better here.

If you take a look at the following link asking a similar question you will see examples when 'car' is better suited.

French people will often use them interchangeably but not always correctly...

https://french.kwiziq.com/questions/view/in-this-case-car-is-used-in-the-same-sense-as-parce-que

Hope this helps!