The correct answer is D. returned.
The word “returned” means to bring or go back to a place or person that you were previously at or with. In this case, the lost child was returned to his parents.
The other options are not as accurate. The word “restored” means to bring something back to its original condition. In this case, the lost child was not in a damaged or broken condition, so he did not need to be restored. The word “sent” means to cause someone or something to go to a particular place. In this case, the lost child was not sent to his parents; he was returned to them. The word “dispatched” means to send someone or something on a journey or mission. In this case, the lost child was not dispatched to his parents; he was returned to them.