Is the include directive in programming an example of eager, lazy, or explicit data loading?

The #include directive in programming (for example, in C/C++) is not directly related to the concepts of eager, lazy, or explicit data loading, as it operates at the preprocessing stage, before compilation. It literally inserts the contents of the specified file at the directive's location, which can be considered eager loading, since all code is included immediately and fully before compilation. Thus, #include is an example of eager loading at the source code level.