Final answer:
Invasion literature is still popular because it deals with relevant fears and provides a safe outlet for processing them.
Step-by-step explanation:
Invasion literature is still popular because it deals with fears that are still relevant today. This genre of literature typically portrays an invasion by a foreign power or an alien attack, which taps into universal fears of the unknown and loss of control. By exploring these themes, invasion literature helps readers process their fears and anxieties in a safe and controlled environment.
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