Isotope analysis is a scientific technique used to study the composition and ratios of stable isotopes within a sample. Isotopes are variants of elements that have the same number of protons but different numbers of neutrons, resulting in differences in atomic mass. By measuring the ratios of isotopes in a sample, researchers can gain insights into various processes such as biological pathways, environmental changes, and geological formations. Isotope analysis is commonly used in fields such as archaeology, geology, environmental science, and biology to better understand the history and dynamics of natural systems.