The biological process that uses the latent heat of vaporization of water is sweating.

Here's how it works:

* Sweat glands release water onto the skin.

* The water absorbs heat from the body as it evaporates. This is because it takes a lot of energy (latent heat of vaporization) to change water from a liquid to a gas.

* This heat loss cools the body down.

This process is essential for thermoregulation in many animals, including humans.