Answer:
Trade
Step-by-step explanation:
Christopher Columbus, in 1492, discovered the New World. The purpose of this voyage was to find a new route through westward to reach Asia. The evidence of trade mentioned in the lines - "They came swimming to boat bringing......." List of words like a bartered, exchange, hawk's bell, glass beads, Parrots, javelin, balls of cotton threads.
The introduction of Columbian Exchange the 1400s led to the beginning of trade in America. The exchanging of plants, animals, and goods (manufactured) from New World to Old and vice versa is called Columbian Exchange.