Which YANG statement defines a block of other statements that can be easily referenced in other areas of a data model?

The `grouping` statement in YANG is specifically designed to collect a set of data definitions into a reusable entity that can be instantiated multiple times using the `uses` statement elsewhere in the data model, thereby promoting modularity and reducing redundancy.

A `container` in YANG is a non-leaf node used to organize data into a hierarchical structure, but it does not provide reusability for definitions in the same way a `grouping` does.

A `submodule` in YANG is used to break down a larger `module` into smaller, more manageable files, rather than defining a reusable block of statements within the data model itself.

A `module` is the top-level organizational unit in YANG, defining a complete data model, but it is not a statement for defining reusable blocks within the data model.