Answer :
Final answer:
The citizens feared an alien invasion in the story 'Monsters are due on Maple Street' due to paranoia and fear of the unknown.
Explanation:
Extraterrestrial beings were feared to be coming to invade the town in the story 'Monsters are due on Maple Street.' The citizens' paranoia and fear of an alien invasion ultimately lead to chaos and distrust among themselves. This reflects how human behavior can be easily manipulated by the unknown and how a lack of understanding can easily spark fear and division.