Imagine you are sitting in a room and watching a play, like your school's Christmas play. Naturalism is a way the actors play their roles to make it seem like you are watching real life happen in front of your eyes.
When you watch a naturalistic play, the actors act as if they are real people in real situations. The actors try to make everything as real and normal as possible by copying how people behave in real life. They might speak like real people, instead of using fancy words, and use everyday movements like waving, walking, or just sitting down like you might do.
It's like watching someone's everyday life, without any special effects or magic tricks. It's just the actors, their movements and the story unfolding as though it were happening right in front of you.
For example, in a naturalistic play, if there is a scene of cooking food, the actors will mimic cutting vegetables, seasoning the dish and placing it in oven. Similarly, a scene where the family is having dinner together will include everyone sitting around the table, chatting and eating like a normal family.
Overall, naturalism in theatre is all about making the play look like it's real life, without any exaggeration, like how you might see things happening in your everyday life.