The correct answer is Igneous and metamorphic rocks.![image](//cdn. Points

• Igneous and metamorphic rocks are characterized by low porosity and permeability, which results in low groundwater storage.

• These rocks are formed through intense heat and pressure, leading to compact and dense structures that restrict water movement.

• Groundwater is usually present in fractures or cracks in these rocks, but the storage is significantly limited compared to other rock types.

• Due to their impermeable nature, igneous and metamorphic rocks often require external factors like weathering or fracturing to enable groundwater flow.

• Regions dominated by these rock types usually have challenges in accessing large-scale groundwater reserves, necessitating alternative water management strategies.![image](//cdn. Information**

• Sedimentary Rocks:

• Sedimentary rocks have high porosity and permeability, making them highly suitable for groundwater storage.

• These rocks are formed by the deposition of materials like sand, clay, and silt, which create spaces for water infiltration.

• Examples include sandstone and conglomerates, which serve as excellent aquifers due to their ability to store and transmit water effectively.

• Sedimentary formations often host large-scale groundwater reservoirs that support agriculture and human consumption.

• Alluvial Deposits:

• Alluvial deposits are composed of unconsolidated materials like sand, gravel, and silt, deposited by rivers and streams.

• These formations exhibit high porosity and permeability, making them ideal for groundwater storage and movement.

• Alluvial aquifers are widely used for irrigation and drinking water purposes due to their ease of access and abundant reserves.

• Regions with extensive alluvial deposits, such as river basins, are considered prime areas for groundwater extraction.

• Limestone Formations:

• Limestone is a sedimentary rock that can store groundwater through karst processes, where water dissolves the rock to create cavities and channels.

• These formations can host significant groundwater reserves, but the storage depends on the degree of karstification.

• Limestone aquifers are often associated with high-quality groundwater due to natural filtration processes.

• Regions with limestone formations may experience uneven distribution of groundwater due to localized dissolution features.