______ makes diverse elements and sub-systems of an organisation to work harmoniously towards the realization of common objectives.

Option 1 -> Cooperation refers to voluntary willingness to work together, but doesn't systematically integrate diverse organizational elements.

Option 2 -> Coordination is the management function that synchronizes and integrates different activities, departments, and sub-systems to achieve unified organizational goals.

Option 3 -> Directing involves guiding and instructing employees through leadership and supervision, but focuses more on individual/team guidance than harmonizing organizational sub-systems.

Option 4 -> Controlling monitors and measures performance against standards to ensure compliance, rather than integrating diverse elements.

Hence, Option 2: Coordination -> Coordination is the essence of management that establishes harmony among different activities, departments, and sub-systems by ensuring all efforts are synchronized and integrated toward common organizational objectives, making it the function that specifically makes diverse elements work together harmoniously -> correct