adding 'power' sorry
OS 
more correctly thrust--- lowers the AoA in this case [aoa=the difference from where the airplane is going and where it looks like its's going] this is from a the 'flattening-out' of the flight path--as thrust contols altitude [basically]-you therefore require higher pitch attitudes for a stall to occur but the stall aoa does not change---this excercise is done to simulate an incorrect go around showing a stall ios not controlled by 'power' but by AOA
PA