Final answer:
Texas has the largest portion of the Ogallala Aquifer beneath it.
Step-by-step explanation:
The Ogallala Aquifer is a large underground water reservoir located beneath eight states in the United States. However, the state with the largest portion of the Ogallala Aquifer beneath it is Texas.
The aquifer is most extensive in the Texas Panhandle region, covering a significant portion of the state. It also extends into parts of New Mexico, Oklahoma, Kansas, Colorado, Nebraska, South Dakota, and Wyoming.
The Ogallala Aquifer is a vital resource for agriculture and is used extensively for irrigation in these states, especially in regions with limited rainfall.