And the Lord God made for Adam and for his wife garments of skins and clothed them.
God covered the shame of Adam and Eve. Sin spoiled the unashamed place of being naked before God (Gen. 2:25), but God provided a way for them to be clothed before Him and each other in right standing. The skins that covered them required something else to die. Blood was shed in order to cover the sins of Adam and Eve. Adam and Eve lived without shame because something else died.