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Which scenario occurs when avian wing loading nears a critical threshold?

A)Stall speed acutely increases above survival
B)Feather barbule interlocking becomes more effective
C)Pneumatic bones surprisingly increase mass.
D)Air sacs facilitate more efficient respiration.

💡 Explanation

Increased wing loading raises the stall speed because exceeding the critical angle of attack initiates boundary layer separation, therefore stall occurs rather than laminar flow which would decrease drag or efficient respiration occurring.

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