You are presented with the question "What leaves the body upon relaxation of a muscle?" and the following answer choices: 
- sweat
 - urine
 - Energy.
 - Energy
 - fat
 - lead
 - blood
 - gasoline

Now knowing that urine leaves the body through a sphincter in the process of urination and urination requires relaxation of the sphincter muscle, choose the best answer.


 

  urine       