Because

[STAYONFLEK]

When do you "car" and when do you use "parce que"?

[RamshackleAlex]

I'm pretty sure they're just straight up synonyms. I've gotten a slightly more formal feel from "car", but you can essentially use whichever one you feel like at that particular moment.

[sue843185]

Thanks for this. I always use parce que.

[Jessasnoop3]

which ever suits the sentence, sometime 'car' might be too short for your sentence so say parce que. other words...preferance

[Ripcurlgirl]

From a French post on WordRef Forum:

Parce que is much more common, car is slightly more formal.
They have the same meaning, but not the same construction:
"parce que" introduces a dependent clause, while
"car" introduces an independent clause.

[Dianox1]

There's no difference, words have the same meaning. But we're using more "car" generally speaking

[ipJlO9tu]

https://www.duolingo.com/comment/9106899/Car-vs-Parce-que