What part of the central processing unit coordinates other units and manages the computer resources ?

The central processing unit is made up of several parts that work together, but only one of them is responsible for directing the others. The arithmetic and logic unit performs calculations and comparisons, and the memory unit stores data, but neither of these decides when or how the various components should act.

That coordinating role belongs to the control unit. It generates the timing and control signals that tell the input unit when to supply data, the arithmetic and logic unit when to perform an operation, the memory unit when to read or write data, and the output unit when to display results. By managing this flow of instructions and resources across every other unit, the control unit acts as the coordinator of the entire processor.

There is no separate "coordinating unit" in standard computer architecture; whenever a question asks which part coordinates or manages the CPU's other components, the answer is the control unit.