Four Songs on Fragility

I found the Tumblr of my best friend from elementary school, through his Facebook profile. I haven’t seen him for the better part of a decade, since he moved to Scotland, England, then New York, but I noticed he still has a pretty spectacular taste in music. I therefore issued a small challenge:

nickheer asked: If you had, say, four songs to describe fragility, which would you choose?

His choices are truly great. Four songs perfectly describing the notion of fragility.