Final answer:
Gaseous drinks are not good substitutes for water because they contain substances other than water, such as carbon dioxide gas in sodas and beer, and proteins and fats in milk.
Step-by-step explanation:
Gaseous drinks such as sodas, beer, and milk are not good substitutes for water because they contain other substances besides water. For example, sodas and beer contain carbon dioxide gas, which gives them their fizziness. Milk contains proteins, fats, and other minerals. While these drinks can provide hydration, they are not as pure and essential as water for replenishing the body's fluids.