The correct answer is B. Mother warned the baby not to play with fire.
A warning is a statement that tells someone to be careful or to avoid something because it is dangerous. In this case, the mother is warning the baby not to play with fire because it is dangerous.
A request is a polite way of asking someone to do something. In this case, the mother could have requested the baby not to play with fire, but she chose to warn the baby instead. This is because a warning is more forceful than a request, and the mother wants to make sure that the baby understands that playing with fire is dangerous.
A forbade is a command that tells someone not to do something. In this case, the mother could have forbidden the baby from playing with fire, but she chose to warn the baby instead. This is because a warning is more persuasive than a forbade, and the mother wants to make sure that the baby understands why playing with fire is dangerous.
I hope this explanation is helpful. Let me know if you have any other questions.