Tamil Nadu has policies in place to promote:

The correct answer is: d) All of the above.

Tamil Nadu has policies in place to promote sustainable resource management, renewable energy development, and energy efficiency.

• Sustainable resource management is the practice of using natural resources in a way that meets the needs of the present without compromising the ability of future generations to meet their own needs. Tamil Nadu has a number of policies in place to promote sustainable resource management, including the Tamil Nadu Forest Policy, the Tamil Nadu Water Policy, and the Tamil Nadu Solid Waste Management Policy.
• Renewable energy development is the process of using natural resources that are constantly replenished, such as sunlight, wind, and water, to generate electricity. Tamil Nadu has a number of policies in place to promote renewable energy development, including the Tamil Nadu Solar Energy Policy, the Tamil Nadu Wind Energy Policy, and the Tamil Nadu Biomass Power Policy.
• Energy efficiency is the use of less energy to achieve the same level of service or output. Tamil Nadu has a number of policies in place to promote energy efficiency, including the Tamil Nadu Energy Conservation Act, the Tamil Nadu Energy Conservation Rules, and the Tamil Nadu Energy Efficiency Programme.

These policies are designed to help Tamil Nadu achieve its goal of becoming a sustainable and energy-efficient state.