Final answer:
The Persian economy was strengthened by the introduction of coined money from Lydia, called shekels, which made trade and tax collection more efficient.
Step-by-step explanation:
The economy in ancient Persia was significantly reinforced by coined money from the Lydians. Around 650 BCE, the kingdom of Lydia, located in western Anatolia, began to use lumps of gold and silver of a standard weight as a form of currency. They soon formalized this system by stamping marks on the lumps to create what were known as shekels, which represented the world's first coins. This new use of currency revolutionized economics, increasing the efficiency of both trade and taxation. Merchants could trade far more easily because they no longer had to carry large quantities of goods for barter, and state powers could collect taxes more effectively.