Which statement describes indicators of water scarcity and the related concepts of virtual water and water footprints?

• A. Per capita renewable freshwater availability is an indicator; virtual water accounts for water embedded in traded goods; water footprints measure total water used across production and consumption.
• B. Virtual water accounts for water embedded in traded goods.
• C. Water footprints measure only water used in agriculture.
• D. Per capita GDP is an indicator of water scarcity.

Answer: (A)

The main concept being tested is how water scarcity is quantified and how virtual water and water footprints fit into that picture. Per capita renewable freshwater availability is a direct way to gauge scarcity because it converts the total renewable water supply into a per-person metric. If each person has only a small share of available fresh water, scarcity is high and competition for resources intensifies. This indicator captures the actual availability of water resources relative to people who need it.

Virtual water refers to the water embedded in goods and services that are traded. It reveals how regions with plenty of water can effectively supply others that are water-scarce, by exporting water use embedded in products. This concept helps explain the global dimension of water scarcity and how trade patterns transfer water demand from one place to another without moving water itself.

Water footprints quantify the total amount of fresh water used across the entire lifecycle of producing goods and services, from production through to consumption, and across all sectors. This broad measure shows the overall draw on water resources by a population or economy, not just in one sector or at one stage. It ties together personal consumption, production choices, and trade, giving a comprehensive view of how water is used.

That combination is why the statement is best: it ties a concrete scarcity indicator (per capita renewable freshwater availability) to two related, globally relevant concepts (virtual water and water footprints) that together describe how water use and demand manifest across production, consumption, and trade. The other ideas are incomplete: virtual water alone doesn’t provide a scarcity indicator, water footprints aren’t limited to agriculture, and per capita GDP does not measure water availability or use directly.