Georgia Residential Contractor Practice Exam

The correct answer is based on the essential principles of proper drainage and erosion control in residential construction. Absorption lines and trench bottoms are critical components designed to manage water runoff and ensure effective infiltration into the ground. When installed true to grade and level along the contour of the land, these systems enhance their functionality, directing water appropriately rather than allowing it to pool or run off in unintended areas.

Following the natural contour helps in maintaining the landscape's drainage pattern, which is crucial in preventing erosion and potential water damage to structures. Proper installation according to the specified grade ensures that water is absorbed efficiently, further promoting responsible land management and environmental protection. This understanding is vital for achieving the long-term effectiveness of drainage systems in residential construction projects.