A butterfly hangs upside down in a sack, chrysalis or cocoon, while it is undergoing a great change. When the time is ripe the butterfly struggle to escape the cocoon. At this point it will release a set of chemicals called hormones. These hormones strengthen the newly formed pairs of wings. The movement inside the cocoon is a struggle which results in pumping fluid into the wings, which will help the wings to expand. This challenge is key to the...