Final answer:
The individual who sent envoys to make peace with neighbors after waging wars was likely a king, as diplomacy was a common practice among rulers in ancient city-states and empires to maintain relationships and peace. Intermarriage could also be used for peaceful acquisitions, and in Plato's view, philosophers were the ideal rulers.
Step-by-step explanation:
The person who sent envoys to make peace with their neighbors after waging wars against them was most likely c) A king. Kings of ancient city-states and empires often used diplomacy to establish or mend relationships with neighboring regions. For example, in Mesopotamia, ambassadors were a crucial part of establishing diplomatic ties, frequently carrying gifts of high value to demonstrate goodwill and respect between rulers. Diplomatic relations were essential in avoiding wars and maintaining peace.
In addition to marshaling resources through warfare, ancient leaders also used peaceful means like intermarriage to acquire territory, as indicated by the answer b) intermarriage to the method ancient city-states and empires used for peaceful acquisition. Prominent historical examples include the Hittite king's attempt to marry his son into the Egyptian royal family to bring about unity.
Regarding the role of government according to Plato, the ideal ruler would be c) philosophers, as he believed in the governance of the wise and knowledgeable. Similarly, the Pharaoh in ancient Egypt held multiple roles, including being c) high priest, which was central to the religious and cultural life of the state.
Lastly, the voyages of Zheng He were primarily conducted a) to impress other states with the power of China, showcasing the Ming Dynasty's might, and to establish China's influence and diplomatic relations with distant lands.