Which elements in the story are considered to be part of fantasy or science fiction?

The choice that includes whisperers, brainsweeping, and transmitting messages accurately reflects key elements of fantasy and science fiction in "The Mysterious Benedict Society." In this story, the concept of brainsweeping represents a fictional technology that alters or manipulates thoughts and memories, which is a common theme in science fiction. Whisperers, as a form of communication, contribute to the imaginative world that the characters inhabit, showcasing the story's blend of real-world scenarios with fantastical elements. Transmitting messages also hints at advanced forms of communication that push the boundaries of reality, a hallmark of both genres. These elements work together to create an engaging narrative that sparks curiosity about the possibilities of the mind and communication within the context of the story.