Which of the following materials is best known for its functionality in drainage systems in landscapes?

Stone is widely recognized for its functionality in drainage systems in landscapes due to its natural ability to facilitate water movement and retention without clogging. The porous nature of stone allows water to flow through it, making it an ideal material for drainage applications. It effectively channels excess water away from areas that might otherwise become saturated, thereby helping to prevent waterlogging and promoting healthier soil conditions for plants.

Additionally, stone can help stabilize soil and reduce erosion, enhancing the overall landscape's durability. While other materials such as plastic can also be used in drainage systems, their effectiveness is often more limited compared to the natural and long-lasting benefits provided by stone. Wood, depending on its type and treatment, can decompose over time, while glass is not a practical choice for drainage due to its solid and non-permeable characteristics. Thus, stone stands out as the most advantageous choice for effective drainage solutions in landscaping contexts.