The correct answer to this open question is the following.
Unfortunately, you did not attach the texts, so we don't know what is their content.
However, trying to help you, we can comment on the following general terms.
If we compare the motivations of modern explorers with those of the explorers from the "age of exploration'," we can say that explorers of the middle ages were hired by the European kings to sail and discover new routes to distant lands such as the Indies and the African coasts, in order to explore, conquer, and exploit the many raw materials and natural resources of those continents.
That is how the Spanish first arrive in the Americas. In this case, Christopher Columbus, who arrived in the Americas on October 12, 1492.
Modern-day explorers dedicate their lives to exploration for other reasons. It is more for research purposes and discovery. Many of these explorers are interested in the preservation of the wildlife, nature, and species that are on the brink of extinction.