How would you express spontaneous conclusions in a song

Explanation:

Alt-J's first album ends with the song Taro -- a song whose outro leaves a very strong impression on me. The outro sounds like a very fitting ending to any album, because the music simply gives me that aforementioned sense of accomplishment, as if arriving after a journey. When I first heard the outro, I immediately knew that this was the last song on the album, simply because of some qualities in the music.

My question: is there a certain composing technique that causes the music to convey this sensation? If so, what is it? I am very interested in attempting to write something similar, just because this intrigues me to no end.

dc was afraid of these new companies because they may take their customers away due to them being more better or something else.