Final answer:
The provided texts do not include information about Dave the sled dog's reaction to being taken out of the sled line. Therefore, we cannot accurately determine whether he was happy, resentful, sad, or indifferent without the context from the specific source material where Dave's story is told.
Step-by-step explanation:
The reaction of Dave, the sled dog, upon being removed from the sled line due to sickness is not directly described in any of the provided excerpts, meaning the question cannot be answered based on the given text. The samples provided include various scenarios of different characters facing hardships and responding in varied ways, from frustration and stubborn dignity to resigned sadness. For instance, one excerpt illustrates a man's acceptance of his impending death in the freezing cold and his choice to sleep as a means of a peaceful end. However, without specific information regarding Dave the sled dog from the source material in question, we are unable to determine Dave's exact reaction to his situation.
Nevertheless, the common theme in these excerpts is the idea that characters respond to adversity or change in different ways, whether it's with defiance, acceptance, or resignation. These emotional responses provide depth and realism to characters in literature, making their experiences more relatable to the reader.