‘And God blessed them, and God said to them, “Be fruitful and multiply, and fill the earth and subdue it, and have dominion over the fish of the sea and over the birds of the air and over every living thing that moves upon the face of the earth”.'
Like the living creatures man is ‘blessed'. They are to produce children and populate the earth. This again brings out that sexual functions, rightly used, are blessed by God. The verb ‘subdue' is strong, as is ‘have dominion'. The latter means ‘trample down'. There is no suggestion that man's task will be easy. The subjugation of the animal world will be hard and demanding. But man has been given what is necessary for victory and control.
So man's function is twofold. To people the earth and to be master over it. But privilege brings responsibility and in that man failed.