Final answer:
The Romans and Greeks made the most significant political contributions to world culture, with the Roman Republic and Empire enhancing the Greek intellectual legacy and democracy. The correct option is 1,3.
Step-by-step explanation:
Several early civilizations made lasting political contributions to world culture, with the most significant being the Romans and the Greeks.
The Romans, through the Roman Republic and the subsequent Roman Empire, shaped Western civilization by taking up the Greek intellectual legacy and enhancing it with remarkable organization and engineering feats.
The Greeks contributed immensely to political thought, particularly with the inception of democratic ideas and processes. While other groups, such as the Vikings and the Moors, had their own impacts, Roman and Greek contributions remain foundational to Western political culture. The correct option is 1,3.