Fact 1: Hurricanes convert heat energy into mechanical energy.

Fact 2: Hurricanes are categorized by the Saffir-Simpson Scale.

Given the two facts above, answer the question "Something that converts heat energy to mechanical energy is categorized by what scale?" with the following options: 
- engines
 - dangerous
 - supersonic
 - Energy.
 - electricity
 - a hydraulic system
 - kinetic energy
 - Saffir-Simpson


 

        Saffir-Simpson 