Answer: The answer is stop bullying.
Getting bystanders involved is the most effective way to stop bullying.
Explanation: Bullying refers to repeated and intentional behaviour of people to use words or actions against an individual or a group of people and also intimidate and abuses an individual. It can be verbal or physical. Bullying is done with the aim to hurt an individual physically or emotionally. Bullying often occur as a result of race, religion, gender and so on.
Bystanders are people who watch bullying. These set of people witnesses the action of bullying either in person or otherwise. Friends, youth, teachers, parents and so on can be bystanders.