A chain, in the context of connection, refers to a series of interconnected links or elements that work together to form a continuous structure. Each link in the chain is connected to the next, creating a strong and flexible arrangement. Chains are commonly used in various applications, such as machinery, transportation, and even in social networks, where connections between individuals can be visualized as links in a chain. In technology, a chain can also refer to a sequence of processes or actions that are dependent on one another. For example, in computer programming, a chain of functions may be executed in a specific order, where the output of one function serves as the input for the next. This concept is essential in understanding how systems operate and interact, whether in physical chains or digital processes.