Final answer:
According to Norse mythology, the first human beings were created from the armpit sweat of the frost giant Ymir.
Step-by-step explanation:
In Norse mythology, according to the Prose Edda, the first human beings were created from the armpit sweat of the frost giant Ymir. The gods fashioned the first man and woman, Ask and Embla, from two trees, and they then became the ancestors of all humans. So, the correct answer is neither the teeth of the world serpent nor the bark of Yggdrasil the world tree.
Learn more about Norse mythology