I'm guessing it represents love
The 2nd and 4th one due to the fact it doesn't give a valid reason but more of an effect of doing so.
Noah feels like he's wasting all his time and youth and that makes him sad and depressed every day. Noah is a young man of 24, who enjoys full health and a willingness to live, but lives in an extremely small city with no hope of development, without any attractions, or anything that provides entertainment. He no longer has any friends, because his childhood friends have already left the city to reach new horizons, only he was left behind watching the years go by and the sadness getting stronger and stronger.
He is very afraid to stay that way forever. Then one day, in an act of courage and impulsiveness, Noah decided that he would travel for a month in South America. He was afraid and knew that after that month he would have to go back to his peaceful and decadent life again, but he would experience, something new, would do something for himself, travel, and put himself in a totally different, unpredictable, and challenging situation.
And so he followed his plan and left for South America. He visited almost every country and got to know new cultures, meet people, taste foods he never heard of, and witness innovative scenarios for him. After that month he returned home, he knew that his life would not change, but he had a sense of accomplishment and could hardly wait for the new adventure.
