Todays reading is Genesis 1-2
In the “Insight” section of the reading, it shows how God first created the realm, and then created the “rulers” of the realm. This is from Genesis 1:16-17, where the sun and moon are rulers of the day and night (the NLT has “presides”). I would probably say that God created the “participants” of the realms. Just a quibble. I can certainly see the sun and moon ruling their realm, and man ruling the other two realms, but not the birds, fish, and animals ruling in their respective realms.