Layers refer to different levels or strata that can be found in various contexts, such as geology, biology, and even in everyday objects. In geology, for example, layers of rock are formed over time, with each layer representing a different period in Earth's history. In biology, layers can refer to the different tissues in an organism, such as the skin, which has multiple layers that serve various functions. In technology, layers are often used in software design, where each layer has a specific role, such as the user interface layer and the data layer. This separation helps in organizing complex systems, making them easier to manage and update. Similarly, in cooking, layers can refer to the arrangement of ingredients in a dish, like a lasagna, where each layer contributes to the overall flavor and texture.