Karl Bühler was a very smart man who lived a long time ago and studied how people use language to communicate with each other. He thought that language was a really important part of how people think and understand things in the world around them.
Bühler came up with some ideas about language that a five-year-old might understand. He thought that when people talk to each other, they use words and sentences to help them explain things, ask questions, or tell stories. He also believed that people can use language to express their thoughts and feelings, and that this is a really powerful way to connect with other people.
Bühler also thought that people don't just use words to communicate. They also use things like gestures, facial expressions, and tone of voice to show others how they are feeling or what they mean. This is something that even a five-year-old can understand, because we all use these things when we talk to our friends or family.
In summary, Karl Bühler was a smart man who studied how people use language to communicate with each other. He believed that language was a really important way for people to connect and understand each other, and that we use more than just words to communicate our thoughts and feelings.