Wings are part of the exoskeleton and attached to the thorax, and behind the head is the thorax. Given these facts, wings are part of the exoskeleton and attached where among the following options:
- on the feet
 - objects that have mass
 - in front of the head
 - an organism's body
 - Earth orbiting the Sun
 - behind the head
 - layers of fat
 - on the face


 

      behind the head   