doordat means “because of / due to”. Starts a sub-clause and sends its verb to the very end.
Subordinating · Onderschikkend
De weg is glad doordat het vriest.
The road is slippery because it's freezing.
Doordat de trein te laat was, miste ik de les.
Because the train was late, I missed the class.
Drag scrambled words into the right Dutch order and master inversion and the verb-final rule.