Complex sentence: Unable to handle him any longer, his mother sent him to foster care and he was placed in a boys care home at 13 but was given the choice go back into foster care or go live with his father and he chose to live with his father.
Split into simpler sentences: Unable to handle him any longer, his mother sent him to foster care and he was placed in a boys care home at 13. He was given the choice go back into foster care or go live with his father and he chose to live with his father.