My attempt at revising the homework paragraph:
Sentence 1: The time between an incident and the process of reporting it remains the essential difference that separates TV news reporting from newspaper reporting.
Sentence 1:
The essential difference between TV news reporting and newspaper reporting remains the time lag that exists between the occurrence of an event and time it takes to report it.
Sentence 2:
Due to the physical nature of the printing process, newspapers cannot instantaneously cover and print a news story.
Sentence 2:
The time necessary to write and edit a news story makes it impossible for newspapers to instanteously cover and publish.
Sentence 3:
Newspapers find it impossible to instantaneously cover and publish a news event.
