Okay kiddo, do you like to watch movies with amazing sound effects and music? The person responsible for making sure all the sounds in the movie are just right is called the director of audiography.
They work closely with the director of the movie to create specific sounds for every scene. So if there's a scene where a car is driving, the director of audiography will make sure it sounds like a car is actually driving.
They also work on adding in music to the movie, making sure it fits with the scenes and sets the right mood.
In short, the director of audiography is like a magician who makes sure everything you hear in a movie is just right, so you can really feel like you're inside the story!