How does Mercy Lewis contribute to the witch trials?

Mercy Lewis contributes to the witch trials primarily by falsely accusing others. Her actions are motivated by a combination of self-preservation and a desire for power in the chaotic environment of Salem. As one of the girls involved in the initial accusations, her claims about witchcraft help to fuel the hysteria that grips the town. By pointing fingers at various townsfolk, she not only shifts suspicion away from herself but also gains a measure of authority and attention in the deeply troubled society. This behavior exemplifies how fear and personal motivations can lead individuals to commit wrongful acts during times of crisis, which is a central theme of "The Crucible". Mercy's role illustrates the dangerous consequences of lies in a society already on edge, ultimately showcasing the broader impact of the witch trials on community integrity and justice.