Final answer:
The Whitechapel killings had fear and social unrest as the main effects on the area, creating a sense of panic and insecurity among the residents.
Step-by-step explanation:
The Whitechapel killings, also known as the Jack the Ripper murders, had fear and social unrest as the main effects on the area. The series of gruesome killings in the late 1800s created a sense of panic and insecurity among the residents of Whitechapel and London. People were afraid to go out at night and mistrust and suspicion grew in the community.