Final answer:
Brick walls, water containers, and concrete can serve as passive solar energy collectors, absorbing and releasing solar energy to heat a space without active systems. Option D is correct.
Step-by-step explanation:
Brick walls, water containers, and concrete can all serve as passive solar energy collectors. These materials are able to absorb, store, and gradually release solar energy, thereby heating a space without requiring active mechanical systems.
For instance, during the day, water circulating in a water wall absorbs sunlight and heat, which is then released at night to warm the air inside a house.
Moreover, a well-designed home with thick walls, especially made of materials such as stone or brick, can capture solar energy and release heat into the evening, aiding in home heating. This concept is particularly beneficial as it can provide domestic hot water and contribute to home heating efficiently.