Final answer:
Yes, a peace officer can act on reasonable suspicion alone.
Step-by-step explanation:
Yes, a peace officer can act on reasonable suspicion alone. According to the Supreme Court case Terry v. Ohio, police officers can stop and frisk a person if they have a reasonable suspicion that the person has committed or is about to commit a crime. This means that even without direct evidence, if an officer has a reasonable suspicion based on specific and articulable facts, they can take action.