Final answer:
Alvin York was declared a hero for his exceptional actions during World War I, including capturing 132 German prisoners on his own.
Step-by-step explanation:
Alvin York was declared a hero because of his remarkable acts during World War I. He initially opposed the war due to his religious beliefs, but when he was drafted, he found himself fighting in the trenches. York's incredible marksmanship skills and bravery led him to single-handedly capture 132 German prisoners, which greatly impacted the outcome of the battle. His actions showcased exceptional courage, resourcefulness, and skill, making him a celebrated hero.
Learn more about Alvin York's heroism in World War I