Tidal energy is a form of renewable energy that can be harnessed from the ocean's tides. It is a type of energy that is generated by the motion of the ocean's tides, which are caused by the gravitational pull of the moon and the sun. Tidal energy can be put under the category of human-made resources.

Human-made resources
Human-made resources are resources that are created by humans through their knowledge and skills. These resources are also known as artificial resources. Tidal energy is a human-made resource because it is generated by the use of technology that has been developed by humans. Tidal energy is generated by using tidal turbines, which are similar to wind turbines but are designed to work in water. These turbines are placed in areas of the ocean where there is a high tidal range, such as estuaries or bays.

Advantages of tidal energy
1. Renewable: Tidal energy is a renewable resource, which means that it can be used over and over again without depleting the resource.

2. Non-polluting: Tidal energy is a non-polluting resource, which means that it does not produce any harmful emissions that can harm the environment.

3. Reliable: Tidal energy is a reliable resource, which means that it is predictable and can be used to generate electricity when it is needed.

4. Cost-effective: Tidal energy is cost-effective in the long run as it requires low maintenance cost and has a lifespan of 75 to 100 years.

Disadvantages of tidal energy
1. Limited availability: Tidal energy can only be harnessed in areas where there is a high tidal range, which limits its availability.

2. High initial cost: The initial cost of building tidal power plants is high, which makes it difficult to fund such projects.

3. Environmental impact: The construction of tidal power plants can have a negative impact on the environment, as it can affect marine wildlife and disrupt tidal patterns.

Conclusion
In conclusion, tidal energy is a human-made resource that has the potential to provide a reliable and sustainable source of energy. While it has some disadvantages, its advantages make it a promising resource for the future.

Tidal energy is converting the energy of tides into more useful form of energy/power for eg Electricity. It functions under water. Since it could be renewed or used again and again it is of the replenishable type.therfor option D is correct