AP biology and AP psychology. I've actually done a project on where fear comes from. We get fear from observing. When that spider bites you or someone else you may develop a fear of it. Many fears come from tv and movies. Why do you think people fear "ghosts"? Amphibians do not fear ghosts. Explain how you pass a concept through genetics. Learning fear is a trait for survival, because having fears keeps us safe. But you are not born fearing things. Someone locked in a box from birth to death would fear nothing, because they have not been exposed. Therefore, they have not learned to fear anything.