Answer:
Correct answer is excommunication.
Step-by-step explanation:
Charity was not one of his powers, because this was a process in which people are giving certain amounts of money to those in needs.
Excommunication is the correct answer because Pope was able to excommunicate someone from the Church. That for example happened in 1054 during the Great Schism, when he excommunicated Patriarch of Constantinople.
Heresy is also not correct as this was not his role, but of people in the Inquisition.
Poverty also is not something that is to be brought by someone, including the Pope, but rather a status of someone who has no material belongings.