* Melting Point: Melting point is the temperature at which a solid turns into a liquid. Water, juice, and milk are all liquids at room temperature, so they don't really "melt" in the traditional sense.

* Freezing Point: The relevant concept here is freezing point. The substance with the lowest freezing point will turn into a liquid the fastest when warmed up from a frozen state.

Here's the breakdown:

* Water: Has a freezing point of 0 degrees Celsius (32 degrees Fahrenheit).

* Juice: Juices are mostly water, so their freezing points are very close to water's. However, the sugar and other components in juice can slightly lower the freezing point.

* Milk: Milk has a slightly lower freezing point than water due to its fats and proteins.

Therefore, milk would likely turn to a liquid fastest when warmed up from a frozen state.

Important Note: The speed of melting/thawing also depends on factors like:

* Starting Temperature: The colder the substance, the longer it takes to thaw.

* Heat Source: A stronger heat source will melt things faster.

* Surface Area: A substance with a larger surface area exposed to heat will thaw faster.