Which of the following is a negative impact of hydroelectric power?

Hydroelectric power doesn't produce electricity reliably

Hydroelectric power uses up water

Hydroelectric power releases carbon dioxide into the air

Hydroelectric changes ecosystems

It uses water, changes water flow, blocks the natural course of rivers

Hydroelectric power uses up water. This is the negative impact of hydroelectric power.

Explanation:

Hydroelectric power will produce electricity that is a positive statement. Hydroelectric will produces electricity sometimes and sometimes due to current issues it will not produce electricity. So it is not a negative impact. For the production of electricity, it uses water and water systems. By using the water systems, our surroundings and water systems are getting spoiled. So this statement is a negative impact on hydroelectricity.