Final answer:
Repellents are the pest control method that deters pests without harming them, in contrast to other methods that may kill or trap pests.
Step-by-step explanation:
The pest control method that keeps away but does not necessarily kill pests is repellents. Repellents are designed to deter pests from an area without harming them. This is in contrast to other methods such as residual sprays, contact sprays, and glue traps, which are designed to kill or physically capture pests. Using repellents is a less invasive approach and aligns with environmentally friendly practices, minimizing disruption to the ecosystem by not killing non-target organisms or causing unnecessary harm to the environment.