What is a challenge that many people have faced in history?

Wars, battles, draughts, and viruses.

Explanation:

In history many people faced tough wars and battles like the revolutionary war, world war, etc.

Draught has caused many people to die in history because of the lack of water they had, this most commonly occurred in desert areas.

Viruses like the Plague spread like a wildfire and were as deadly as a snake bite. This virus is the cause for many deaths in history.

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.