Concept:
Kathakali is a classical dance-drama tradition of Kerala.
Traditionally, Kathakali was performed by male artists, even for female roles.
Step 1: Understand Kathakali.
Kathakali combines dance, music, acting, facial expressions, hand gestures, and colourful costumes.
It is based on stories from epics like the Ramayana and Mahabharata.
Step 2: Identify the traditional performance practice.
Traditionally, Kathakali was performed only by men.
Male performers also played female characters.
Step 3: Final conclusion.
Therefore, the correct answer is:
\[
\boxed{\text{Kathakali}}
\]