Final answer:
Reduced axial tilt results in milder seasons and colder winters with increased snow accumulation, favoring northern hemisphere continental glaciation. The albedo effect from snow cover further contributes to cooling, enabling glaciation.
Step-by-step explanation:
Conditions for northern hemisphere continental glaciation are most favorable when the hypothetical axial tilt is reduced. A lower tilt means milder seasons due to less variation in day length and direct sunlight throughout the year. With a hypothetical axial tilt of 16°, the Tropic of Cancer would be at 16° N latitude and the Arctic Circle would be at 74° N latitude, indicating a difference of 58° in latitude.
During the periods when Earth is tilted less, there is less variation in the paths of the sun and consequently, milder seasonal changes. This can lead to colder winters with more snow accumulation, thus promoting glaciation. Moreover, as indicated by Milankovich's theory, the increased albedo effect due to the snow cover could reflect more sunlight, thereby not warming up the land efficiently after winter, contributing further to the glaciation process.