Final answer:
Knowing the depth of an aquifer helps estimate the water level in the well, which is crucial for well-drilling preparations to ensure a reliable source of water.
Step-by-step explanation:
Knowing the depth of an aquifer can help a person prepare to dig a well because it helps estimate the water level in the well (option c). When you understand how deep the aquifer is, you can then decide how deep to drill the well to reach the water. This is essential for ensuring that your well will have a reliable water supply. Additionally, the depth information may also inform you about potential recharge rates and the need for pumps to extract the water from deeper sources. Understanding the geology of the area, including the type and thickness of strata such as sandstones, which make good aquifers, is also important when planning to drill a well. This ties into the concepts of porosity and permeability, which are critical for groundwater storage and movement.