Cognitive Behavioural Therapy (CBT) focuses on the link between thoughts, emotions and behaviour. It helps you identify irrational or distorted thinking patterns and replace them with more realistic and helpful beliefs, which in turn change how you feel and respond.
Exposure and Response Prevention (ERP) is a specialised form of behaviour therapy, often used for OCD, phobias and anxiety disorders. It involves gradual, intentional exposure to feared situations while reducing safety behaviours and compulsions, so that your brain learns you can tolerate the anxiety and it naturally decreases over time.