Step 1: Identifying approaches in Human Geography.
Human Geography has several approaches, including:
- Quantitative Revolution: Focuses on applying quantitative methods and models to study geography, emphasizing spatial data analysis and mathematical approaches.
- Spatial Organisation: Studies the spatial distribution and arrangement of different phenomena in geography.
- Areal Differentiation: Examines how different regions and areas have distinct characteristics and differentiation.
Step 2: Identifying the exception.
- Post-modernism: This is not typically considered an approach of Human Geography but more of a philosophical or cultural approach influencing various disciplines, including geography. It emphasizes relativism and subjectivity in understanding human experience, contrasting with the more structured methods used in the other approaches.
\[
\boxed{\text{Thus, Post-modernism is not an approach of Human Geography.}}
\]