What is the term for any object that another object relies on to function properly?

The term that describes any object that another object relies on to function properly is "Dependency." In the context of application development and programming, a dependency represents a relationship where one component requires another to operate as intended. This means that the functionality of the dependent object is contingent upon the availability and correct operation of the object it relies on.

Understanding dependencies is crucial in designing applications because it helps in managing relationships between different components. An example might be a software component or module that requires a specific library or framework to function. Without these dependencies properly addressed, the application is likely to experience errors or malfunctions.

"Precedent" typically refers to something that has come before, often in a legal or historical context, and does not illustrate the relationship of reliance. "Reference" indicates a pointer or citation to another object or concept but does not imply the necessity for the referenced object to function. "Association" describes a relationship between entities but lacks the specific nuance of reliance that defines dependencies. Thus, the most accurate term for this context is indeed "Dependency."