Fact 1: Urine is the liquid waste product of the body that is excreted by the urinary system.

Fact 2: Acid urine is usually darker thatn alkaline urine.

Given the two facts above, answer the question "What can liquid waste be?" with the following options: 
- gas
 - Gaseous
 - Solid
 - Acidic
 - acid rain
 - expelled
 - Static
 - dangerous


 

    Acidic     