The state changes involved in the following poems are exothermic.

A, Antarctic glacier snow reduction is the sublimation phenomenon that solid ice directly turns into gas, absorbing heat.

B, filament combustion is a melting phenomenon, absorbing heat.

C, fog dispersion is the phenomenon that liquid water vaporizes into water vapor and absorbs heat.

D, the "ice flower" on the glass window in winter is the phenomenon that water vapor in the air condenses and releases heat.

So choose D.