In water resources, what is 'abstracted water' and how can over-abstraction affect downstream ecosystems?

In water resources, what is 'abstracted water' and how can over-abstraction affect downstream ecosystems?

• A. Abstracted water is water withdrawn from surface or groundwater sources; over-abstraction reduces flow, harms aquatic habitats, lowers dilution of pollutants, and can cause subsidence.
• B. Abstracted water is rainfall captured for agriculture; over-abstraction increases rainfall.
• C. Abstracted water is seawater pumped for irrigation; over-abstraction cools downstream waters.
• D. Abstracted water is groundwater recharge; over-abstraction increases water table.

Answer: (A)