In the context of global water resource management, which of the following definitions correctly describes the term water stress?
The state of having a reliable, affordable, and sustainable supply of clean water of sufficient quality to meet the needs of a population.
A situation where the demand for water exceeds the available amount during a certain period, or when poor quality restricts its use, typically occurring when supply falls below 1,700 m31,700 \text{ m}^31,700 m3 per person per year.
A long-term regional imbalance where water consumption exceeds the natural precipitation and replenishment rates, leading to a permanent water deficit.
An acute water crisis where the available annual supply falls below 1,000 m31,000 \text{ m}^31,000 m3 per person, threatening agricultural productivity and human survival.
