God speaks and it is there. God creates by speaking. In seeking an answer, we must be governed by what Scripture tells us.
Several passages come to mind.
God created by His word. What was involved with the creation by the Word is made more clear as we go to the New Testament. In the beginning was the Word, and the Word was with God, and the Word was God. Yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist. For in Him all things were created, in heaven and on earth, visible and invisible, whether thrones or dominions or principalities or authorities - all things were created through Him and for Him.