“Natural Selection” comes from Alexander’s upcoming album, Aeropop. It begins with a one minute introductory piano-lead piece. This opening is quite serene in nature and gives the song a relaxing start. In the next part, the piano becomes sharper and serves as the main beat while other instruments (and the vocalists) gradually join in. By the time the guitars enter, the song has built up to an appealing combination of sounds that carry it to the final part of the song. This final part is another slow piano piece that serves as nice way to end the song.