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← Nature & AnimalsWhich mechanism explains lift increase when birds soar circling upwards?
A)Thermal updraft exploitation (thermals)✓
B)Reduced basal metabolic expenditures
C)Decreased gravitational potential energy
D)Enhanced magnetoreception of airflow
💡 Explanation
Birds exploit thermal lift because convection transfers heat causing air to rise, resulting in increased lift allowing soaring; therefore, thermals contribute to circling, rather than changes in gravitation forces or metabolic expenditure alone.
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