Homework? We don't do your homework for you. Have you looked up any of this anywhere? What did you discover? What have you learned already? Tell us, and we can help you fill in the blanks. For starters, find the answers to these two questions...on your own, in your books, not from "Ask somebody at AN."
What does "leukodepleted" mean?
What do the cells that are removed from leukodepleted blood do? If they weren't there, what would the effect be?
By leukodepleted, do you mean irradiated? I am in Australia, so it might be a terminology difference, but I haven't heard of leukodepleted and have worked both in paeds and oncology where the "special blood" goes.