I am not 100% on this but crest is usually associated with a wave so if there is an answer for a wave I would go with that
One of Adam’s drawbacks in his music career was that he was unable to understand the guitar and bass in counterpoint.
In music, counterpoint is the connection between voices that are harmonically associated yet free in beat and form. The term is taken from the Latin punctus contra punctum signifying "point against point".
The theme being presented was think twice before you say anything. I think this was the theme because, the grasshopper could not be responsible of getting food, and the ants did not want to give their food. So the theme was think twice before you say anything.