The Aral Sea is enclosed between Uzbekistan and Kazakhstan.

Explanation:
The Aral Sea is a landlocked body of water located in Central Asia. It was once one of the largest lakes in the world, covering an area of about 68,000 square kilometers. However, due to human activities such as irrigation projects and the diversion of rivers, the Aral Sea has been shrinking since the 1960s and has lost a significant amount of its water volume.

- Location of the Aral Sea:
The Aral Sea is located in the southern part of Kazakhstan and the northern part of Uzbekistan. It is situated in the low-lying flatlands of Central Asia, between the vast deserts of Karakum to the south and the Kyzylkum to the east.

- Uzbekistan and the Aral Sea:
The eastern part of the Aral Sea lies within the territory of Uzbekistan. In the past, the Aral Sea was divided into two separate basins, the Small Aral Sea in the north and the Large Aral Sea in the south. However, due to the extensive water withdrawals from the rivers that feed the sea, the two basins have become distinct bodies of water.

- Kazakhstan and the Aral Sea:
The western part of the Aral Sea falls within the borders of Kazakhstan. The shrinking of the Aral Sea has had severe environmental and socio-economic consequences for the people living in the region. The exposed seabed has resulted in the release of toxic salts and chemicals into the air, leading to a range of health issues for the local population.

In conclusion, the Aral Sea is enclosed between Uzbekistan to the east and Kazakhstan to the west. The two countries share the responsibility of addressing the environmental challenges posed by the shrinking of the sea and working towards sustainable solutions for the future.