You are presented with the quiz "What organism's instruments of flight are part of the exoskeleton and attached to the thorax?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "wings are part of the exoskeleton and attached to the thorax" and "butterflies bask to heat up their wing muscles for flight". 

So, what's the best answer to the question?


 

    butterflies       