system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What the heck is an Adam’s apple, what purpose does it serve, and why do men only have it?
gpt
Men have evolved to have a deeper voice, a voice that develops during puberty. To enable this, the larynx (or voicebox) expands so it can produce longer wavelength sounds. This expansion causes the cartilage around the voice box to protrude slightly from the throat. This protrusion is the Adam's apple.