Por que as potências europeias investiram fortunas e aperfeiçoaram tecnologias náuticas para se fortalecerem na disputa pelos mares?

The voyage of Columbus

inaugurated a network of global trade that connected both hemispheres. Silver from the New World was minted into the peso de ocho, a widely accepted currency that connected major trade systems. In the Pacific, the Spanish colony of Manila connected the New World with Asia markets; much of the New World's silver ended up in China. Despite this new level of global connectivity, this era saw major disruptions and changes in trade networks. Attempts by Portugal and Spain to monopolize trade in the Indian Ocean led to the down fall of the Swahili cities and the fall of Malacca. In Africa, the incorporation of West Africa into the Atlantic system drew the focus of trade from Trans-Saharan to the west. The fall of Constantinople to the Muslim Ottomans and Vasco DaGama’s maritime route to the Indian Ocean lessened Europe’s dependence upon Silk Road trade. The Atlantic System would emerge as the premier trade system in this era.

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seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.