The best answer is "emotional appeal" - it is based on the feelings (emotions) that the parents have when they think about any danger to their child. It's also a kind of manipulation since this is a very strong emotion, one that makes logical reasoning more difficult.
<span>An imperative sentence is to command as a declarative sentence is to make a statement as of a fact for example The sky is blue or The traffic is heavy or The population is growing.</span>
