To bring peace, and end violence

A. Soothe

B. Harmonise

C. Pacify

D. Tranquilize

Answer: Option C

Solution(By Examveda Team)

One word substitute is Pacify.

Soothe: gently calm (a person or their feelings).
Harmonise: add notes to (a melody) to produce harmony.
Pacify: quell the anger, agitation, or excitement of.
Tranquilize: (of a drug) have a calming or sedative effect on.