One of the dangers of icing includes:

Icing on an aircraft can create significant hazards, one of which is decreased lift. When ice accumulates on the wings and control surfaces, it disrupts the airflow over these critical components. This disruption can lead to a reduction in the lift generated by the wings because the smooth airflow is altered, making it more turbulent. As a result, the wing may struggle to generate the necessary lift, especially at lower speeds where lift is already a critical factor for maintaining flight.

This diminished lift capacity can lead to a higher likelihood of stalls, decreased maneuverability, and overall reduced aircraft performance, all of which pose serious safety concerns during flight. Understanding this aspect of icing is crucial for a pilot's decision-making and operational safety in challenging weather conditions. In contrast, options like increased fuel efficiency and improved aerodynamic shape do not reflect the realities of icing effects, as these concepts are generally associated with better aerodynamic performance rather than the hindrance caused by ice accumulation. Lower stall speed is also misleading, as icing typically increases stall speed due to the additional weight and altered aerodynamics.