Answer:
They make writing more direct.
Step-by-step explanation:
By placing the action before the character, the writer can emphasize, or be more direct, on what they want the reader to know.
"A blood-curdling scream sounded from Mitsa."
The blood-curdling scream is more important than Mitsa is (as sad as it sounds), because it means someone was killed, and only then do we need to know who was killed. (Sorry Mitsa, if anyone exists with that name)