Final answer:
The correct answer is Russia. Secretary of State William H. Seward negotiated the purchase of Alaska from the Russian Empire in 1867.
Step-by-step explanation:
The subject of this question is social studies. The question asks about the person who secured the purchase of Alaska. The correct answer is Russia. In 1867, Secretary of State William H. Seward negotiated the purchase of Alaska from the Russian Empire for a sum of $7.2 million. This acquisition is known as the Alaska Purchase.
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