The plebeian council, also known as the Concilium Plebis, had the power to pass laws (plebiscites) that applied to all citizens of Rome. However, it did not have the power to declare war, sign peace treaties, or judge religious cases, nor did it serve to advise consuls specifically about patricians.
Among the options provided:
- Declaring war and signing peace treaties: This was primarily a power of the Senate and the consuls, not the plebeian council.
- Veto power over all the other parts of the Roman government: The plebeians had tribunes who could exercise veto power over actions of the Senate and magistrates, but this is more specific to tribunes than the council as a whole.
- Judging religious cases throughout the empire: This was not a function of the plebeian council.
- Advising the consuls on the needs of the patricians: This statement is incorrect, as the plebeian council represented the interests of the plebeians, not the patricians.
Thus, none of the provided options accurately describes a power of the plebeian council. The most closely related notion would be the influence that tribunes of the plebs had in exercising vetoes on behalf of the plebeians, but that is not directly related to the council itself.