Fact 1: Some arthropods have special excretory structures.

Fact 2: Insects are the largest group of arthropods.

Given the two facts above, answer the question "What can have special excretory systems?" with the following options: 
- feces
 - barnacles
 - animals
 - cacti
 - fungi
 - wings
 - soil
 - insects


 

        insects 