What is the detailed interpretation of Allah's saying: {Indeed, We made that which is on the earth an adornment for it that We might test them as to which of them is best in deed}, and what is the relationship between this test and the adornment of the earth?

The meaning of Allah Almighty's saying: "Indeed, We have made that which is on earth an adornment for it, that We may test them as to which of them is best in deed," is that Allah, Glory be to Him, has made everything on Earth, from its creatures, an adornment for it, in order to test and examine His servants with it. Some of them use this adornment as an aid to obey Allah, while others use it as a means to disobey Allah. This test is to determine which of them is best in deed, meaning who dedicates sincere worship to Allah Almighty. Commentators have mentioned that this adornment includes everything on Earth, whether it is considered beautiful or what might appear harmful, for the existence of all that indicates the Creator and His attributes. Other verses have clarified that this test is the wisdom behind the creation of death, life, the heavens, and the Earth, and excellence in deed is to worship Allah as if you see Him. All of this is an admonition and a warning against following whims and preferring the perishable over the everlasting.