What carries and transmits water underground?

Water is carried and transmitted underground primarily through aquifers, which are geological formations that can store and transmit water. These aquifers consist of permeable materials such as sand, gravel, or rock that allow water to flow through them. Additionally, groundwater moves through interconnected pores and fractures within these materials, driven by gravity and pressure gradients. This underground water is crucial for maintaining ecosystems and providing drinking water and irrigation.