Task 3. Complete the sentences: 3. Ivan Pavlov's experiments demonstrated how animals form ______.

Analysis: Ivan Pavlov's experiments, most famously with dogs, demonstrated the principles of classical conditioning. This involves learning through association, where an animal learns to associate a neutral stimulus with a naturally occurring stimulus, leading to a conditioned response. The term that best describes this learned association or behavior is 'conditioned reflexes' or 'associations'.

Answer: conditioned reflexes