Concept:
Folk theatre is often used as a tool for social change and communication (Development Communication) because of its accessibility and deep roots in the community.
Step 1: Evaluating the utility of Folk Theatre for promotion.
The assertion is true. Governments and NGOs frequently use folk forms (like Nukkad Natak or Nautanki) to spread awareness about health, education, or social issues because it speaks the language of the people.
Step 2: Comparing Folk Theatre with Electronic Media.
The reason is correct and explains the assertion. Unlike TV or digital ads, folk theatre is live and interactive. It requires no expensive equipment or electricity, making it "cost-effective" and highly "flexible" for reaching rural or marginalized populations where e-media might not be as effective.