Which of the following is the method of hiding data within another media type such as graphic or document?

Spoofing involves impersonating a legitimate entity such as an IP address, email sender, or website to deceive victims, and has no relationship to embedding data within media files.

Steganography hides secret data inside a carrier medium - such as an image, audio file, or document - by subtly altering bits in a way imperceptible to the human eye or ear. Unlike encryption, steganography conceals the very existence of the message rather than just its content, making detection far more difficult.

Packet sniffing is the process of capturing and analyzing network traffic in transit, not a technique for concealing data inside a file or media object.

Cryptanalysis is the study and practice of breaking cryptographic algorithms or ciphers, which is entirely unrelated to hiding data within a carrier medium.