Final answer:
The building of the Amu and Syr dams caused the Aral Sea to shrink, increase in salinity, and led to the destruction of habitats and ecosystems.
Step-by-step explanation:
The building of the Amu and Syr dams caused a number of problems in the Aral Sea. The diversion of water from the Syr Darya River and the Amu Darya River for irrigation purposes led to a significant decrease in water flow into the sea. This resulted in the shrinking of the sea, increased salinity, and the destruction of habitats and ecosystems. The decline of the Aral Sea has also had negative impacts on the fishing industry, human health, and the regional climate.