Final answer:
The correct answer is c) Solar panels. Homeowners can apply for a federal renewable energy tax credit for systems like solar panels, which provide a means to create environmentally friendly and self-sufficient energy supply for residential heating and electricity.
Step-by-step explanation:
A homeowner may apply for a federal residential renewable energy tax credit toward the installation of certain energy-efficient systems. Among the options listed, the correct choice is c) Solar panels. Solar panels can provide both domestic hot water and home heating, as well as electricity for a house by capturing the sun's energy. This is done through configurations that could be either grid-tied or could include local storage for energy produced.
Technologies such as solar heating and solar thermal energy reflect the trend towards developing environmentally friendly homes with reduced dependence on conventional heating and cooling. In the context of renewable energy, solar energy systems exemplify individual implementations of distributed power generation, allowing for a more self-sufficient energy supply.