Solution
Option 1 -> Chain of command establishes the formal line of authority and reporting relationships, clearly defining who reports to whom in the organizational hierarchy.
Option 2 -> Coordination involves synchronizing activities and resources across different departments to achieve organizational goals, not reporting relationships.
Option 3 -> Delegation is the process of assigning tasks and authority to subordinates, but doesn't specifically establish reporting structures.
Option 4 -> Centralization refers to the concentration of decision-making authority at top levels, not the reporting relationships themselves.
Hence, Option 1: Chain of command -> This principle directly establishes the vertical hierarchy and reporting relationships in an organization, making it clear who reports to whom at each level -> correct