God decided to tear the kingdom from Solomon and leave one tribe for him because he had

God decided to tear the kingdom from Solomon and leave one tribe for him because he had turned his heart away from the Lord. Solomon had started out as a faithful and wise king, but over time, he began to accumulate wealth, power, and wives, which led him to turn away from God's commandments. He started worshipping other gods and idols and engaging in practices that were forbidden by God. As a result, God decided to punish him by taking away most of his kingdom and leaving only one tribe for him to rule over, as a reminder of the consequences of turning away from God. Therefore, the correct option is: "turned his heart away from the Lord."