The correct statement is:
The potato grows easily in cold, harsh climates. This means that it grew well in northern Europe, providing a dependable food source that led to an increase in population.
The introduction of the potato to Europe, particularly in regions like northern Europe, provided a new, nutritious, and calorie-dense food source that could be cultivated in various climates, including less fertile soils. Its ability to thrive in colder climates contributed to improved food security, which in turn supported population growth.