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← Nature & AnimalsWhich consequence of induced drag occurs when avian wingtip vortices intensify?
A)Downwash reduces aerodynamic lift efficiency✓
B)Air sacs increase internal humidification
C)Asymmetrical feather wear boosts maneuverability
D)Increased soaring minimizes energy expenditure
💡 Explanation
Increased wingtip vortices intensify downwash due to induced drag, causing decreased lift efficiency because they redirect airflow downward, therefore reducing upward force, rather than influencing feather wear or pulmonary gas exchange.
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