Which set of properties correctly describes hydroelectric energy?

1. Hydroelectric energy is a renewable source, drawn from flowing water. 2. It is naturally available, since the water cycle continually replenishes it. 3. It is environmentally friendly, because generating it releases no combustion gases. 4. It works by turning turbines that drive generators. 5. It is reliable rather than unreliable, so any option including unreliability is wrong. _Source: NECTA CSEE 2021 Physics 031, Question 1: Multiple Choice, item (vi)_