The correct answer is Christopher Columbus.
Christopher Columbus is the European explorer credited with being the first European explorer to encounter the Americas. In his first voyage in 1492, Columbus landed in Hispaniola (modern day Dominican Republic). This encounter lead to several other European explorers setting out to colonize these new lands as a means to gain wealth.
Explanation
The immediate cause that caused the outbreak of the First World War was, as I already mentioned, the murder of the Austrian-Hungarian archduke, Francisco Fernando, in Sarajevo Serbia, on June 28, 1914
Shahjahanabad.
Shahjahanabad was built by the Mughal Emperor Shahjahan, along the bank of river Yamuna, Indian.