Final answer:
Pantomime was the most popular form of theater in the 18th century.
Step-by-step explanation:
The most popular form of theater in the 18th century was pantomime. Pantomime refers to a form of theatrical performance that relies on physical gestures, facial expressions, and body movements to convey a story or narrative without using spoken words. It often featured exaggerated characters and comedic elements, and was especially popular in Europe during the 18th century.
Learn more about Theater in the 18th century