Biology is the correct answer
Crosses on the shields of his soldiers.
Answer:
his ministry began five years after he had been a captive
Explanation:
Zheng He was a commander of a large Naval Fleet. He guided this fleet on expeditions to promote trade and collect tribute from across the Western Seas
Because the plague killed so many of the poor peasantry the labor force was greatly diminished. The farms were left unplanted and the market place spread the disease even faster. Merchants were primary spreaders of the plague because of their tendency to travel from place to place, unknowingly spread germs with their products.