Complete the Words

The concept of currency evolved from the ancient practice of bartering, where goods and services were directly exchanged. To trade, societies began to use commodity , which objects with value salt shells. , this led to creation of standardized metal made gold, silver, or bronze, which were more durable and portable. Governments started minting coins with official marks to guarantee their weight and value. This system established a more efficient and reliable foundation for economic transactions and wealth accumulation.