Final answer:
The judge is the neutral trial participant responsible for keeping the progress of the trial moving forward.
Step-by-step explanation:
The trial participant who is neutral and responsible for keeping the progress of the trial moving forward is the judge. The judge is an impartial arbiter who ensures that the trial is conducted fairly, enforces courtroom rules, makes rulings on objections, and determines the sentence if the defendant is found guilty.
Learn more about The role of the judge in a trial