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high entry costs prevent new producers from entering the market.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.

They traveled to the pacific ocean

The renaissance was a major turn in history. many new ideas and technological advances came into place. it was a time of new thinking, where many were inspired by enlightenment beliefs. most people were branching out from what the government or the catholic church was saying, and using science to answer questions about the world around them. it was also a time when the arts were booming. artists, musicians, mathematicians, philosophers, and historians were becoming more and more of a respected society. the renaissance was a major turn in history.