Which components are typically found in a septic system?

The correct choice highlights the fundamental elements of a septic system, which are essential for its operation. A septic tank, drain field, and soil make up the core components that work together to treat and dispose of wastewater.

The septic tank serves as the primary vessel for settling solids and allowing anaerobic digestion to occur, breaking down organic matter. This process is crucial for reducing the volume of solids before the effluent moves on to the drain field. The drain field, also known as the leach field, then provides an area where the liquid effluent can be further treated by the soil's natural filtration and biological processes. The soil plays a vital role in this system, as it helps to further purify the effluent before it reaches groundwater.

In the context of wastewater management, the understanding of these components is essential for ensuring proper installation and maintenance of septic systems, adhering to local regulations, and protecting public health and the environment.