To unlock this trophy you only need to listen to the words Emmett is emphasizing. His father doesn't count.
It's quite easy to guess which goes to what, but in case you have no idea, here's a list.
SPRINKLE BACTERIA FOOD
Eating
Food
Feed/Fed
Bacteria
Micro-organism
Scatter
Shake
STROKE FIRE
Bellowing
Burning
Fire
Flame
Hot
Hot air
RELEASE GASEOUS PRESSURE
Bags of gas
Bladders
Release
Vent
Pressure/Pressuring
Release valve
TURN ELECTRICAL CRANK
Crank
Current
Spins
Shock
Spark
Turn
Rotation
Generated
Lightning
Move
There are 4 stages in which you need to pass. At the 2nd or 3rd is when you ignore Emmett's father.