Fact 1: An automobile engine transforms chemical energy into mechanical energy.

Fact 2: Automobile engines have a range where they are most efficient.

Given the two facts above, answer the question "The efficiency of an engine range is due to what?" with the following options: 
- Movement of an air mass
 - principals of aerodynamics
 - transportation technology
 - heat production
 - heat is produced
 - A transportation fuel
 - Inches or fractions of inches.
 - chemical to mechanical energy


 

        chemical to mechanical energy 