Answer :
Final answer:
The Irish potato famine was caused by a potato blight that led to mass famine and the deaths of over a million people.
Explanation:
The Irish potato famine was primarily caused by a potato blight that destroyed the main food source of the Irish population. This blight led to a series of crop failures, resulting in a mass famine, the deaths of over a million people, and the emigration of millions more.
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