Answer:
They paid special taxes for practicing their own religions.
They sent soldiers to fight for the Romans during wars.
Step-by-step explanation:
Rome's provinces made Rome rich. They provided food, taxes, metals and other resources to Rome. Rome gave the provinces peace and stability (see Pax Romana). While some of the provinces were glad to be part of the Roman empire (Egypt, Turkey), others wanted the Romans to go home (Britain, Gaul).