The base is original from the producer (chords and melodies), but is complemented with elements that complement the song that come from samplepacks, usually, vocal chops, guitars, wobbles sections, glitch effects. It is the standard in which most of producers work, in a project you will find MIDI files made by the producer, but also melodic loops.
Starting with a cool progression to make the break and drop unique, de break grows together with the vocal and the drop is a totaly powerfull.
Sample pack Dropgun Samples - Vocal Future Bass 2
Loop name VFB2_kit1_break_melody_arp_synth_106_b_minor