Which process may result in an inversion layer at about 5000 ft (1500 m) height?

Question

Question PPL(A) - Private Pilot License - Meteorology

QuizVDS · Accepted Answer

Widespread descending air within a high pressure area

QuizVDS · Answer

Intensive sunlight insolation during a warm summer day

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Ground cooling by radiation during the night

QuizVDS · Answer

Advection of cool air in the upper troposphere

Id 14 - PPL(A) EN - Which process may result in an inversion layer at about 5000 ft (1500 m) height?