Why God Used a Rib to Make Eve in Genesis 2
God formed the woman from part of the man himself, so she shares his nature and dignity. The rib makes her origin God's act and her kinship with the man unavoidable.
Why God Created Eve in Genesis 2:18–25
God did not wait for Adam to complain about being alone. He named the lack himself, brought the animals past the man to show what none of them could supply, and then built a woman from Adam's own body and brought her to him.