"Thespian art" refers to-

Correct answer: The art of drama or acting.

Thespian art:
- Thespian শব্দটি নাটকের সাথে জড়িত এবং 'Thespian art' বলতে 'The art of drama or acting.' কে বোঝায়।
- A "thespian" is an actor or actress, particularly one involved in theater, while "thespian art" refers to dramatic art and the broader world of theater.
- The term originates from Thespis, an ancient Greek performer considered the first actor for stepping out of the chorus to perform as an individual.

Source:
1. Merriam-Webster dictionary.
2. Accessible Dictionary.
3. Cambridge Dictionary.