Red Seal Plumbing Practice Exam 2025 – Comprehensive All-In-One Guide for Exam Success!

An aquifer is an underground layer of porous and permeable rock or sediment that contains and transmits groundwater. This means that water can flow through the aquifer and be extracted from it. While options A and B describe bodies of water and underground features, they do not specifically mention the supply of water or its ability to be extracted. Option D also describes a type of rock, but it does not mention the presence of water. The most accurate description of an aquifer is option C, which specifically mentions its underground location, water-bearing properties, and ability to yield a supply of water.