The Portuguese invention that was used to explore the seas and rivers with more ease was the caravel.
What was the caravel?
This was a ship that the Portuguese built to sail the world's oceans. It was smaller than most ships in the 15th century but this allowed for easier maneuverability.
As a result, the ship was used to great effect to sail from Europe to Africa and in the Atlantic Ocean thereby making exploration easier.
Find out more on the caravel at https://brainly.com/question/887431.
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