Fact 1: Wings are part of the exoskeleton and attached to the thorax.

Fact 2: Insects have exoskeletons.

Given the two facts above, answer the question "What is attached to insects' thorax?" with the following options: 
- sugar
 - Energy.
 - antennae
 - Energy
 - wings
 - nothing
 - food
 - pancreas


 

     wings    