Final answer:
B) Distillation
The water purification process used in the manufacture of cosmetics that involves heating water until it vaporizes and then collecting it as a liquid is called distillation.
Step-by-step explanation:
The water purification process used in the manufacture of cosmetics, where water is heated until it vaporizes and is then collected as a liquid, is called distillation.
Distillation involves the evaporation and condensation of water to remove impurities and separate substances that have different boiling points.
It is particularly useful in the cosmetics industry to ensure products are made with water that is free from impurities that could interact with the chemical composition of cosmetic products or harm the skin.