In persuasive texts, writers use rhetorical devices, patterns of writing that seek to sway their readers by emphasizing ideas and stirring readers' emotions. Examples include parallelism, anaphora, antithesis, and repetition.

an unbound book has no cover; paris is a single man

explanation:

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.