The correct answer is B. aquicludes.
An aquifer is a water-bearing layer of rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a water well. Aquicludes are impermeable rock formations that do not allow water to flow through them. They are often found below aquifers and can act as a barrier to groundwater flow.
A perched aquifer is a type of aquifer that is perched above an impermeable layer of rock or soil. This type of aquifer is often found in areas with karst topography, which is characterized by limestone bedrock that is highly fractured and karstified. Perched aquifers are typically shallow and can be easily depleted by pumping.
A spring is a place where groundwater flows out of the ground. Springs can be found in a variety of settings, including mountains, valleys, and even deserts. They are often a source of drinking water and irrigation water.
In conclusion, the rock formations that cannot store groundwater are called aquicludes. Aquicludes are impermeable rock formations that do not allow water to flow through them. They are often found below aquifers and can act as a barrier to groundwater flow.