Cold tolerance refers to the ability of organisms, such as plants and animals, to survive and thrive in low-temperature environments. This adaptation can involve physiological changes, such as the production of antifreeze proteins or the alteration of cell membranes to prevent freezing. Cold-tolerant species can endure frost and snow, allowing them to inhabit regions with harsh winters. In agriculture, understanding cold tolerance is crucial for crop selection and breeding. For example, certain varieties of wheat and barley have been developed to withstand colder temperatures, ensuring better yields in cooler climates. This knowledge helps farmers optimize their planting strategies and improve food security.