Answer:
The correct answer is 3. The South American Guarani Aquifer System is a supply of groundwater.
Explanation:
The Guarani Aquifer System is the largest underground reserve of freshwater in the world, occupying an area of approximately 1,200,000 km². About 70% (840,000 km²) of the area occupied by the aquifer is located in the subsoil of center-southwest Brazil. The remaining is distributed between northeast of Argentina (255,000 km²), northwest of Uruguay (58,500 km²) and southeast of Paraguay (71,700 km²). The current population of the area of the aquifer is estimated at fifteen million inhabitants.
