Pets are reliable friends to owners needing companionship. Doctors need to consider that a pet is most likely to lower blood pressure and stress in a patient. Pets need to suffer from lack of attention and shelters can provide homes by partnering with those that use a pet.
Answer:
Without knowing the context of this question I would say a lot of horror films come from real life experiences exaggerated and from dreams of the writer.
Explanation: Read about horror writers and their influences.