Will reward and mark brainliest and higher rank
the time and place in which an author writes
rarely have any impact on the story itself
often affect the way a story is told
cannot be determined in most historical cases
are generally unrelated to the story's plot

ur answer is in the it

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.