Final answer:
Alai whispered "Salaam" to Ender as he was leaving the Launch group in "Ender's Game", indicating their deep bond and Alai's goodwill towards Ender. Option D.
Step-by-step explanation:
When Ender had to leave the Launch group in the novel "Ender's Game" by Orson Scott Card, his friend Alai whispered to him a significant and memorable phrase. The correct answer to what Alai whispered is: D. "Salaam".
The phrase Alai whispered, "Salaam", plays an important role in the book because it signifies the deep bond and friendship that has formed between Ender and Alai.
Despite coming from different backgrounds, they find common ground and respect in each other, making this moment poignant in Ender's journey. Additionally, the term "Salaam" means "peace" in Arabic, conveying a message of goodwill from Alai to Ender as he moves on to his next challenge.
So Option D is the correct answer.