The description matches Complexity because:
1. Multidimensional Nature: - "Numerous interrelated conditions" - Example: PESTEL factors affecting simultaneously
2. Analytical Challenge: - "Easier to understand in parts" - Requires decomposition (SWOT, Porter's Five Forces)
3. Key Indicators: - Multiple stakeholders - Interconnected variables - Non-linear relationships
Why not others: - (A) Uncertainty: About unpredictability, not interconnectedness - (C) Relativity: Context-specific nature not discussed - (D) Dynamic: Change speed not emphasized
Final Answer: (B) Complexity