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

Fact 2: An exoskeleton is an external framework.

Given the two facts above, answer the question "What body part would be attached to the external framework?" with the following options: 
- heart
 - insects
 - respiratory system
 - wings
 - humans
 - Tail
 - fat
 - digestive system


 

    wings     