Virtual water refers to the amount of water embedded in the production of goods and services, particularly in agricultural and industrial processes. Among the options provided, the correct response that can be considered virtual water is:
Water used to make your daily electrolyte drink.
This is because the production of the drink involves the use of water in the manufacturing process, which illustrates the concept of virtual water. The other options do not fit the definition of virtual water as they pertain to direct water usage or conservation rather than water used in the production of a product.