This is the 8924th most frequent French word.
cars
"Buses" or "coaches" in English.
In this sentence, 'cars' refers to 'buses', often intercity or tourist coaches.
Les cars transportent les touristes aux différents sites.
Buses transport tourists to different sites.
Here, 'car' is a conjunction meaning 'because', explaining the reason for the preceding clause.
Il n'est pas venu, car il était occupé.
He didn't come, because he was busy.
In this sentence, 'cars' refers again to buses or coaches, distinguishing them from 'voitures' which are personal cars.