Option 1, his silk tie gleams in the sunlight, is an example of "exploding a moment."
To explode a moment is to slow it down, to write in slow motion, so that every little detail, trait, feeling is exacerbated. The idea is to provide as many details as possible in order to make the reader aware of everything that is going on.
The rest of the sentences, although they convey a message, do not provide as many intimate details as option 1.