The correct answer to this open question is the following.
The significance of the explorations of Columbus is that he received the sponsorship of the King and Queen of Spain to discover a shorter route to the Indies. Yes, Ferdinand of Aragon and Isabella del Castille, supporter Cristopher Columbus on his trip. He sailed with three ships: "La Niña," "La Pinta," and "La Carabela." Columbus did not arrive at the Indies but discovered America on October 12, 1492.
Jaques Marquette was a French explorer and missionary who was the first to explore the Mississippi River. He knew it so well that he was also the first to map it.
English explorer Henry Hudson explored the North American territories. He discovered new routes to North America, navigating through the waters of the today known as the Hudson Strait and getting to the Hudson Bay.