Causes the victim to freeze up completely
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Impedimenta
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imperius
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avada kadavra
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incendio
A
Correct answer
Explanation
The Impediment Jinx (Impedimenta) causes the victim to freeze or hinder their movement, slowing them down. It's used in dueling and during Quidditch. Imperius is the mind-control curse, Avada Kedavra kills, and Incendio produces fire. Harry uses this jinx during the Third Task.