Why?

God put the tree of knowledge of good and evil in the Garden of Eden to give Adam and Eve a choice to obey Him or disobey Him. Adam and Eve were free to do anything they wanted, except eat from the tree of knowledge of good and evil. Genesis 2:16-17, “And the LORD God commanded the man, ‘You are free to eat from any tree in the garden; but you must not eat from the tree of the knowledge of good and evil, for when you eat of it you will surely die.’” If God had not given Adam and Eve the choice, they would have essentially been robots, simply doing what they were programmed to do. God created Adam and Eve to be “free” beings, able to make decisions, able to choose between good and evil. In order for Adam and Eve to truly be free, they had to have a choice.