What process causes latent heat being released into the upper troposphere?

Question

Question PPL(A) - Private Pilot License - Meteorology

QuizVDS · Accepted Answer

Cloud forming due to condensation

QuizVDS · Answer

Descending air across widespread areas

QuizVDS · Answer

Stabilisation of inflowing air masses

QuizVDS · Answer

Evaporation over widespread water areas

Id 48 - PPL(A) EN - What process causes latent heat being released into the upper troposphere?