how did the relationship between spain and portugal play a part in columbuses first voyage

Question

i need help with the question and i dont understand it so therefore i need help with it and im really confused 

 

Answer 1

Portugal started exploring first, with Prince Henry the Navigator going East around Africa to India. Remember, Columbus thought he was going to India the other way around - but he landed in the Americas - but they were called the West Indies. Columbus wanted to find a western route to India, so first he went to King John II of Portugal. King John was not interested, probably because Portugal had a huge trade already going in Africa and India. Columbus then went to Ferdinand and Isabella of Spain. At first they were busy dealing with the Moors in the south, but they defeated the Moors in 1492 and then regained what is now the southern tip of Spain. Exploration was all about finding goods such as spices and exotic items from India, China and Africa, at first. They did not know what was in the Americas. There was already the beginning of slave trade from Africa. Spain wanted to get in on the riches, so they financed Columbus. After he reported what he found, King John protested and appealed to the Pope. There was a boundary established giving Portugal everything East of the edge of what is now Brazil and Spain the west. This would prevent the Spanish from going after Africa. However Portugal wanted a better deal, so they made another treaty, the treaty of Tordesillas, which moved the boundary further west. This is why Brazilians speak Portuguese and the rest of South America was under Spanish control. Of course this did not prevent others such as the Dutch and British from exploring as well.