If vibrations of the atoms in a liquid can be used to identify that liquid 's boiling point, then to identify that liquid 's boiling point requries?

Answer choices:
- vibrations of the atoms
 - kinetic energy
 - degrees Celsius
 - The bending of a ray of light
 - degrees celcius
 - Evaporation of water
 - evaporative cooling
 - fissures of hot, acidic water

 

 vibrations of the atoms         