The diagram below shows how electricity is generated in a hydroelectric power station Summarise the information by selecting and reporting the main features and make comparisons where relevant

Given is the diagram delineating the process of how electricity is generated in a hydroelectric power station.
It is perceptible that this is a linear process with multiple steps, which commenced with water flows from the river to the high-level reservoir blocked by the dam and ends with electricity being produced and supplied to the national grid by power lines.
The process initiates when water falls from the river to the high-level reservoir blocked by the dam with capacity operating when the day is opened and the evening is closed. Therefore, flow of water to generate electricity is operated by an extremely powerful pump that flows in large reversible turbines to the power station in the daylight, the rest continues to flow to low-level reservoirs. After that, they were powered by generators switched by power lines to the national grid. On the other hand, leftover water in a low-level reservoir flows back to a pump in a power station; it is shipped to high-level reservoirs by reversible turbines. Ultimately, the loop happens continuously like that so the water of the river can supply electricity.