Answer:
In 2003, the South Aral Sea divided into eastern and western basins
In 2004, the South Aral Sea was 25% of its original size.
In 2009, the South Aral Sea lost its eastern basin (later was recovered due to later heavy snowmelt, then gone again, then recovered by heavy snowmelt, then gone again)
Step-by-step explanation:
This happens because the main sources of the Aral Sea's water are being diverted for power or energy. Its sources are the Syr Darya, and the Amu Darya.