Assertion: The behavioural approach focuses on learning stimulus-response connections and their reinforcement.

Reasoning: Behaviourists believe that personality can be understood as an individual's response to the environment.

Both Assertion and Reasoning are true, and Reasoning is the correct explanation of the Assertion.

The Assertion states that the behavioural approach focuses on learning stimulus-response connections and their reinforcement, which is true. The Reasoning provides an explanation for this by stating that behaviourists believe personality can be understood as an individual's response to the environment, which aligns with the focus of the behavioural approach.