You are presented with the question "The decline of speed is associated with what?" and the following answer choices: 
- 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

Now knowing that friction causes an object to lose energy and friction causes the decline of speed, choose the best answer.


 

     an object losing energy    