By the end of Endgame, the original lynchpin of the Marvel Cinematic Universe is no more – Tony Stark sacrifices himself to wipe out Thanos once and for all. It's one hell of a way to bring closure to a 22-movie arc.Explanation:
Answer: It appears the last sentence lacks the most context.
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Your question was a bit vague so I'm struggling to know exactly what you are asking here.
Answer: This sentence shows Elion's determination and commitment to learn.