Answer:
the closeness between Joseph and Pierre
Step-by-step explanation:
I think this is the story of a milkman and his horse who had a great reputation. The milkman Pierre was very close to his horse and always took the same route for 30 years before his foreman, Jacques finds the horse dead (don't remember how the horse died) Pierre is so overwhelmed with sadness he walks straight into traffic and is killed which is later revealed to be because he was blind
The story shows the strong relationship between a man and animal.