Final answer:
The composition of finished work from various shots and soundtracks is known as editing, a key post-production process where the director selects and arranges footage to create the final film.
Step-by-step explanation:
The composition of a finished work from various shots and soundtracks is called editing. During post-production, a director will go through all the takes to select the ones that best fit their vision for the finished piece. Most of the shots filmed won't make the final cut, making the editing process crucial as it largely dictates the narrative and the impact of the film. This function can be seen as revising in the broader creative process, where content is rearranged, deleted, and added to create a cohesive whole. The sound designer also plays a crucial role by curating sounds that align with the production's overall design, contributing significantly to the audience's experience.