Final answer:
The Roman and Han Empires both faced external attacks and internal aristocratic abuses, contributing to their collapses, resulting in a similar fate for these ancient civilizations.
Step-by-step explanation:
The falls of the Roman and Han Empires share several similarities. First and foremost, both empires faced attacks from outsiders, with Rome contending against barbarians and the Han against nomadic tribes. These attacks contributed significantly to the instability and eventual downfall of both empires. Another similarity is seen in the socio-political realm, as both empires experienced significant aristocratic abuses, where the elites of the society exploited their power, contributing to internal decay and weakening the state's structure. Furthermore, the widening gap between the rich and poor within these empires served to increase social tensions and reduce the effectiveness of their respective socio-economic systems. Hence, the correct answer is option a): Both faced attacks from outsiders and aristocratic abuse.