Answer:
C). To teach children how to interact with adults.
Step-by-step explanation:
Carl Sandburg in his poem 'How the animals lost their tails?' emphasizes the idea of 'politeness among the animals' in order to suggest or imply a lesson of mannerism among the young readers that they need to be respectful and humble while interacting with the adults/elders.
Carl Sandburg was well-aware of the prevailing rude and discourteous behavior of the children towards the adults. Therefore, he attempts to convey this message through the representation of these ideals(politeness and respect) among the young animals in order to teach a lesson to the young children and encourage them to adopt such humble behavior and etiquette. Thus, option C is the correct answer.