What does the term "rasa" refer to in Indian theatre?

a. Emotional essence or flavor created through performance
b. The climax of a play
c. Absurd and illogical situations
d. The protagonist's journey

The term "rasa" in Indian theatre refers to option a, which is the emotional essence or flavor created through performance. Rasa is considered to be the main goal of theatre in Indian aesthetics and is associated with different emotions or sentiments that are evoked in the audience.