Final answer:
Having the Roman Empress as a hostage could increase the prestige of the Vandal leader by establishing a peaceful relationship, deterring Roman retaliation, and facilitating cultural exchange.
Step-by-step explanation:
Having the Roman Empress as a hostage, or captive, could increase the prestige, status, and power of the Vandal leader for a few reasons:
- It establishes a peaceful relationship with Rome, as Rome would not want harm to come to its Empress.
- It deters Roman retaliation, as Rome may fear that any harm done to its Empress would result in a strong military response.
- It facilitates cultural exchange, as having the Empress as a hostage allows the Vandal leader to learn about Roman customs, strategies, and technologies.