Virtual water trade is being looked at by experts as a solution to the world's water crisis. What does virtual water (VW) imply?

1. The question asks for the definition of virtual water (VW) in the context of the virtual water trade as a solution to the world's water crisis. 2. Virtual water refers to the hidden flow of water when commodities are traded from one place to another. 3. Specifically, it represents the volume of water required to produce a commodity or service. For example, the virtual water content of a kilogram of wheat is the amount of water needed to grow that wheat. 4. Option (B) accurately defines this concept.