Concept:Thorndike's theory is called Trial and Error Theory, also known as connectionism. It explains learning through repeated attempts and gradual correction.Explanation:Thorndike studied how animals learn using a puzzle box. A hungry cat was placed inside a box that could be opened by pulling a loop. At first, the cat made random movements, like clawing or biting. These were trial and error actions. Eventually, the cat accidentally pulled the loop and escaped. Over many trials, the cat learned to go directly to the loop. This showed that learning happens by repeating successful actions and discarding unsuccessful ones. The theory emphasises that learning builds connections between stimuli and responses through practice.Answer:A. Trial and error theory