According to the behavioural approach, personality is best understood as:

Response to the environment

The behavioral approach in psychology downplays the significance of internal psychological processes in understanding behavior. Behaviorists prioritize observable and measurable data, which they believe can be defined and studied rigorously. Their focus lies on studying the learning of stimulus-response associations and the role of reinforcement in shaping behavior. From the behaviorist perspective, personality is best understood as an individual's responses to the environment. They view personality development as primarily driven by changes in response patterns, whereby individuals learn new behaviors in response to new environments and stimuli.