Which of the following is a characteristic of composting toilets?

Composting toilets are designed to facilitate the biological breakdown of human waste through the process of composting. This technology utilizes aerobic conditions, which include the presence of oxygen, to decompose waste materials naturally and efficiently. The process involves microorganisms that digest the organic matter, ultimately transforming it into compost that can be safely used as a soil amendment when properly processed.

This option emphasizes the eco-friendly nature of composting toilets, which operate on minimal water usage compared to traditional toilets. The efficient breakdown of waste is central to their design and function, providing a sustainable alternative for waste management, especially in areas where conventional sewage systems may not be feasible.

On the other hand, the other options pertain to characteristics that do not align with composting toilets. For instance, traditional composting toilets are not directly connected to a sewage system, they typically conserve water rather than requiring large amounts for flushing, and they are not limited to use in high-rise buildings, as they can be effectively utilized in a variety of settings, including rural homes and off-grid situations. Understanding these unique features of composting toilets underlines their value as an alternative waste management solution.