Final answer:
The nature of the threat during the Salem Witch Trials in 1692 and the Red Scare in the 1950s was a fear of an unseen enemy infiltrating and destroying society.
Step-by-step explanation:
The nature of the threat during the Salem Witch Trials in 1692 and the Red Scare in the 1950s was the fear of an unseen enemy infiltrating and destroying society. In Salem, it was the fear of witches and the devil's influence, while in the Red Scare, it was the fear of Communists and their supposed threat to democracy. In both cases, the threat was largely based on irrational fears and exaggerations.