Final answer:
Chief Lapulapu led a revolt against Spain in 1521, which resulted in the killing of Ferdinand Magellan during the Battle of Mactan.
Step-by-step explanation:
According to the introduction to Noli Me Tangere, during the revolt against Spain led by Chief Lapulapu on the island of Mactan in 1521, the person who was killed was Ferdinand Magellan. Magellan's demise occurred at the Battle of Mactan on April 27, 1521, where he was defeated by Lapulapu's forces. This event symbolized the resistance of the Filipino people against foreign domination and has since turned Lapulapu into a folk hero in the Philippines. His legacy is celebrated and remembered in various forms including statues, currency, and even a national day in his honor.