According to the preamble, which responsibility of the constitution most relates to the united states’ interactions with other nations?

In the U.S. Constitution preamble it is stated that the people of the United States stablished the Constitution in order to provide for the common defence, among other things. This is the responsability most related with other nations because when it says “common defence” is refering to the security of all the States of the Union, which only can be in danger if the threat is external, which means, other nations.

dylan has written many enduring songs and he has received several awards for his musical achievement;  

any written work with artistic value can be considered literature; especially if such work is publicly recognized, and has had importance and endurance among people; whether is poetry or fiction or drama or even criticism, since it's the transcendence and representation of a culture, language or people in a period of time to more people, using letters (words), regardless the subject.

the nobel prize in literature is given to authors from any country based on a body of work as a whole that inspires and nurses the life of humanity.  

and the work of bob dylan matches that description, therefore is well deserved since he'd created new poetic expressions within the american song tradition, that has inspired and influenced the lives of many people, not only withing the united stated but worldwide as well.