Which statement explains how determining the age of the remains of living things is similar to dating rocks?

Both methods use radioactive decay to estimate age. Living things and rocks can contain unstable isotopes, which decay into stable elements at predictable rates; measuring the amounts helps determine how much time has passed. Choice A, “Organisms and rocks both contain stable and unstable elements,” describes this similarity. The particular isotopes may differ between organic remains and rocks, so B is too specific.

AI-written and checked against the verified answer.