Situation–Reaction (Chain snatching witnessed while on scooter): You see two boys on a bike snatch a woman’s gold chain and speed away. What should you do?

Introduction / Context:
Street crimes happen fast. Your response should maximize safety, evidence preservation, and chances of apprehension without endangering yourself or others.

Given Data / Assumptions:

• Offenders on a motorcycle; you are on a scooter.
• They are fleeing; risk of high-speed chase exists.
• Police can be alerted quickly (dial emergency number).

Concept / Approach:
Direct pursuit is dangerous and may escalate harm. The highest-value action is to alert police immediately with specific details: bike type/color, plate number (if any), direction of travel, suspects’ clothing/helmets, time and location. Comforting the victim is humane but secondary to triggering pursuit by authorities. Passive observation is unacceptable.

Step-by-Step Solution:
1) Pull over safely; call police immediately.2) Provide precise descriptors and your contact.3) If safe, assist the victim and any witnesses to compile details.

Verification / Alternative check:
Nearby CCTV, traffic junction cameras, and rapid broadcast can aid interception; timely reporting is crucial.

Why Other Options Are Wrong:
Chasing risks collision/retaliation. Consoling only delays law enforcement alert. Standing and watching is inaction.

Common Pitfalls:
Vigilantism; sharing incident on social media before informing police.

Final Answer:
Inform the police immediately with accurate details.