Fact 1: Urine leaves the body through a sphincter in the process of urination.

Fact 2: Elimination of urine is normally a voluntary process for adults.

Given the two facts above, answer the question "Urine leaves the body through voluntary elimination for adults?" with the following options: 
- forceful pressure
 - hostile elimination
 - voluntary elimination
 - Converting waste.
 - solid, liquid, gas
 - violent churning
 - It helps them survive
 - By wind and rain


 

   voluntary elimination      