Concept:Comic relief is a break from emotional tension, and it is mostly linked with serious drama.Explanation:In tragedies, the mood becomes heavy because of suffering and sad events.A playwright uses comic relief to lighten this tension for the audience.It gives the spectators a short moment of laughter or amusement before the serious action continues.This device creates a balance so that the audience does not remain overwhelmed by pity and fear throughout the play.Therefore, comic relief is a common feature of tragic drama.Answer:B. tragedies