The correct answer is Full legal name.

A direct identifier is an attribute that can uniquely point to a single individual on its own. A Full legal name is treated as a primary direct identifier because it is intended to uniquely identify a person in legal and administrative contexts and therefore is handled as personally identifiable information that requires protection.

IP address is not a direct identifier in this context because it typically identifies a device or a network endpoint rather than a specific person by itself. It can become identifying when combined with provider logs or other records, so it is often treated as an indirect or linkable identifier.

Home address is not listed as the direct identifier here because an address refers to a location and may describe a household rather than uniquely naming a specific individual without additional information. An address is commonly considered linkable data that can identify someone when combined with other identifiers.

Religious affiliation is not a direct identifier because it describes a sensitive characteristic rather than a unique identity marker. Religious affiliation can reveal personal information and is protected as sensitive data, but it does not by itself uniquely identify a single person.

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