Which of the following battles is associated with the conflict between Octavian and Antony?

The Battle of Actium is the correct answer because it was a decisive confrontation that took place in 31 BCE between the forces of Octavian and those of Mark Antony, along with Cleopatra VII of Egypt. This naval battle marked a critical turning point in the struggle for control over the Roman Republic. Octavian's victory at Actium led to Antony and Cleopatra's eventual defeat and their subsequent suicides, paving the way for Octavian to become the sole ruler of Rome and eventually be proclaimed Augustus, the first Roman Emperor.

Understanding the significance of the Battle of Actium is essential as it not only ended the political rivalry between Octavian and Antony but also shifted the power dynamics in Rome, leading to the establishment of the Roman Empire. The other battles listed are noteworthy in Roman history but are not directly related to the conflict between Octavian and Antony, making them less relevant to the specific question.