A water table can be described as

Step 1: Analyze the question The question asks for the best description of a water table, a basic term in the hydrology section of Physical Geography.

Step 2: Explain the concept When rain falls, some water infiltrates the soil and moves downward through pores and cracks in permeable rock. It continues until it reaches a zone where all the spaces are filled with water, called the zone of saturation. The upper surface of this zone is the water table.

Key points:

• It is not a physical "line" or a separate pool. It is the level below which the ground is saturated.
• It rises in the rainy season and falls in the dry season.
• It is close to the surface in low, wet areas (such as river valleys) and deeper beneath hills.
• Wells are dug deep enough to reach below it to get water.

Step 3: Evaluate each option

• A. A pool of underground water: Wrong. Groundwater is held within the pores of rock, not in an open pool.
• B. A line connecting underground springs of equal height: Wrong. This is not the definition. Springs appear where the water table meets the surface, but the water table is not defined this way.
• C. A line indicating the depth of all artesian wells: Wrong. Artesian wells relate to confined aquifers under pressure, which is a different idea.
• D. The general level of underground water in an area: Correct. This matches the definition: the upper surface of the zone of saturation.

Step 4: Answer

Tip: Think of the water table as the "water level of the ground". Just as water in a bucket has a top surface, the ground has a level below which everything is saturated. If an option says "pool", "line of springs" or "artesian", be suspicious. WASSCE usually uses the plain wording "level of underground water."