Answer:
Option (4)
Step-by-step explanation:
The invention of turbines have helped in saving the natural and non-renewable resources. These turbines are used in the windmills and dams, which uses the wind and water respectively, as its energy to produce electricity.
The wind mills are the structures that are designed in such a way that the blades (turbines) in it rotates due to the wind, and this converts the wind energy in to electrical energy. These are useful as it produces electricity. They are constructed in the regions where the wind speed is relatively high.
Similarly, in dams also, the turbines are used that rotates due to the continuous flow of water and resulting in the production of electricity.
These are considered as the renewable resources as the wind and water is available in a large quantity that facilitates the productions of electricity. These are alternatives of non-renewable resources.
Hence, the correct answer is option (4).