system
Given the following post, respond as if you're commenting on Reddit:
human
What is the physical difference between people who can sing well and those who cannot?
gpt
Physically: The physiological shape of your vocal tracts can determine the quality of your voice.

Also, most singers have trained their vocal chords to create the sounds they want to produce. Anyone can become a better singer through practice and training. Not everyone will be as good or sound like a professional but everyone can get better.