Which statement is true regarding approach procedure altitudes in cold weather?

Adjustments to approach procedure altitudes in cold weather are necessary to ensure adequate clearance due to the effects of density altitude on aircraft performance. In cold temperatures, the air is denser, which can affect the lift and stall characteristics of the aircraft. This means that while the altimeter might indicate a certain altitude, the aircraft's actual performance may be compromised if a fixed altitude is used without adjustment.

By making adjustments, pilots can account for the increased lift and reduced stall speed that occur in cold air, ensuring that they maintain a safe altitude above terrain and obstacles. Neglecting this adjustment could lead to being lower than intended, increasing the risk of collision with obstacles during the approach phase. Therefore, it is crucial to always reassess and adjust altitude requirements based on current weather conditions for safety during an approach.