The correct answer is D) Tanks.
Tanks are small artificial water bodies that are used for irrigation, drinking water, and other purposes. They are a major source of water for agriculture in Telangana, and excessive water extraction for irrigation purposes can lead to their depletion. This can have a number of negative consequences, including reduced crop yields, water shortages for other uses, and environmental degradation.
Rivers, lakes, and reservoirs are also important sources of water for Telangana, but they are less vulnerable to depletion from irrigation than tanks. This is because they are larger and have a greater capacity to store water. Additionally, they are often regulated by dams and other infrastructure, which can help to control the amount of water that is extracted for irrigation.
In conclusion, excessive water extraction for irrigation purposes is a concern for the sustainability of Telangana’s tanks. This is because tanks are a major source of water for agriculture in the state, and they are more vulnerable to depletion than other water bodies.