Final answer:
The Northeast of North America is most impacted by acid rain due to the presence of power and industrial plants and a high population density, along with pollution from the Midwest.
Step-by-step explanation:
The area of North America that is most impacted by acid rain is the Northeast. This region, which includes states like New York, Pennsylvania, and Massachusetts, has a high concentration of power and industrial plants, as well as a dense population. The prevailing wind direction brings pollution from the Midwest, leading to high levels of acidity in the rain in the Northeast.