What is the area in the ground where all the pore spaces are filled with water?

• A. Zone of Aeration
• B. Zone of Saturation
• C. Water Table
• D. Aquifer

Answer: (B)

In groundwater terms, the area where every pore is filled with water is the zone of saturation. This region lies below the water table, where all the voids in the soil or rock are completely water-filled. Above it is the zone of aeration, where pore spaces contain both air and water. The water table marks the upper boundary of the saturated zone. An aquifer, on the other hand, is a body of permeable material capable of storing and transmitting groundwater, which can include saturated zones but is not defined solely by pore-space saturation.