this question has no real answer, it can only be answered by belief. If you believe in Religion then depending on what God you worship, he is the one that created man. If you dont, then you believe...
Almost every religion explains who created humans. For example, in Zoroastrainism it was Ahura Mazda, in Hinduism it was Brahma and in Judaism, Christianity and Islam it was God.
Genesis...
One aspect is Man was created by clay as our father Adam{A.S}.
Many religions have explanations as to how man was created. In the abrahamic religions, God created man out of moist clay....