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

Fact 2: Butterflies bask to heat up their wing muscles for flight.

Given the two facts above, answer the question "What organism's instruments of flight are part of the exoskeleton and attached to the thorax?" with the following options: 
- insects
 - organs
 - barnacles
 - butterflies
 - to move people
 - honeybees
 - it needs them
 - Electric devices


 

    butterflies     