Final answer:
Ender continued his voyage to Lusitania because he was committed to his mission of writing a Speaker for the Dead and honoring a deceased person's life.
Step-by-step explanation:
Ender continued his voyage to Lusitania even after Novinha canceled her call for a Speaker because he was already committed to the mission. In the book 'Speaker for the Dead' by Orson Scott Card, Ender is tasked with writing a Speaker for the Dead, a eulogy that tells the true story of someone's life. His voyage to Lusitania is part of his quest to understand and honor the life of a deceased person. Despite the cancellation, Ender still felt compelled to complete his mission because he believed in the importance of speaking the truth.