Metadata is described as which of the following?

While metadata fields can sometimes be unique, 'a unique data field' is too specific and does not encompass the broader definition of metadata as descriptive information.

Metadata is essentially 'data about data,' meaning it describes characteristics of a data element, such as its creation date, author, size, type, or permissions, without being the content of the data element itself.

A file header is a specific type of metadata that appears at the beginning of a file, but metadata is a much broader concept that applies to many forms of data beyond just files.

Metadata is typically small descriptive information, whereas 'a large data object' usually refers to the primary data content itself, like a video or large document.