Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

Q: In Game Of Thrones Season 4, the wildling Craster leaves his sons, from his wives (at the same time his daughters), into the woods to be taken by the White Walkers' king, after that he turned them into new White Walkers. I tried to figure out the reason behind this event, but no clues.  So, What is the story behind this action? And why does the White Walkers' king need those new born babies?

A: Why does Craster give those sacrifices to the White Walkers?
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Q: In Bohemian Rhapsody (2018), Freddie is trying to reunite with the Queen Band in front of Jim Beach.    Freddie: I went to Munich. I hired a bunch of guys. I told them  exactly what I wanted them to do...and the problem was... they did it.  No pushback from Roger. (points to Brian) None of your rewrites.  (points to John Deacon) None of his funny looks. I need you.   Why is it a problem for Freddie if guys from Munich did what he wanted?

A: Why is it a problem for Freddie if the guys from Munich did what he wanted?
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Q: Have the directors ever explained why the TV show Game of Thrones is named after the first book, instead of the book series "A Song of Ice and Fire"? However, it is based on the whole book series.

A:
Why is the TV show titled "Game of Thrones" and not "A Song of Ice and Fire?"
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