Relative dating methods establish the age of an object or layer by comparing it to others, placing items in a chronological sequence rather than providing an exact age.
- Radiocarbon Dating, Fission-track dating, and K-Ar Dating are absolute dating methods that yield specific ages or date ranges via isotopic measurements.
- Stratigraphy, a relative dating technique, analyzes earth layers (strata) to determine the relative age of objects or fossils within different strata.
Final Answer: \[\boxed{\text{The correct answer is (4) Stratigraphy.}}\]