Which outcome maximizes lift efficiency when a bird increases wing loading during flight?

💡 Explanation

As a bird increases wing loading (weight per unit wing area), lift must increase; increasing angle of attack actively generates more lift due to increased downward deflection of air utilizing proper airflow over the surface. Therefore increasing angle of attack minimizes excessive energy expenditure, rather than flexing due to decreased flight stability or relying on air sacs and alula feathers which contribute less to lift generation.

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