What makes me human?

If it is DNA then why would I need a claw machine? (Note that this defnition on DNA, which in itself is mega-odd since DNA differs, would mean that via synthetic biology one could yield humans - according to such a definition. But this does not have to be correct, so the definition would be flawed.)

If it is not DNA, how else to prove it?

A CAPTCHA is not concerned with your biology or philosophy, only with if you’re an automated request.