Fact 1: Friction causes an object to lose energy.

Fact 2: Friction causes the decline of speed.

Given the two facts above, answer the question "The decline of speed is associated with what?" with the following options: 
- an object gaining energy
 - a lot of human deaths
 - decrease stamina
 - hyperthyroidism
 - an object losing energy
 - an object gaining momentum
 - body temperature reduces
 - an object going faster


 

     an object losing energy    