Which of the following is a factor of ice strengths?

• A. Border
• B. Wind
• C. Snow/layered
• D. Go

Answer: (B)

Wind is a major factor that shapes ice strength because it applies real dynamic loads to the ice surface. When wind blows over ice, it creates surface pressure, drives waves, and can cause cracking and buckling. This stress can weaken ice or cause it to fail even if the ice appears thick, so wind conditions often determine whether the ice can safely bear weight.

The other options don’t reflect a direct mechanical influence on ice strength in the same way. A border doesn’t change the ice’s internal strength; go isn’t a factor at all. Snow on top can affect conditions by insulating or adding weight, but the prompt highlights wind as the primary, immediate influence on ice strength.