In the context of sustainable development, there are three widely recognized core pillars:
Urbanisation, while a significant aspect of modern development, is not considered one of the basic pillars of sustainable development. While urbanization has impacts on sustainability, it is not a standalone pillar; instead, it intersects with and influences the three core pillars mentioned above.
Therefore, the correct answer is Urbanisation.
The option that is not a basic pillar of sustainable development is (4) Urbanisation.
Additional Context:
Correct Answer: (4) Urbanisation.