What is a "Mezuzah," according to Halacha?

The correct choice is that a "Mezuzah" is a parchment scroll with Torah verses. According to Halacha, a Mezuzah is affixed to the doorways of Jewish homes, containing specific passages from the Torah, primarily the Shema Yisrael. This practice serves as a reminder of Jewish faith and divine protection, symbolizing the presence of God in the home. The Mezuzah must be written by a qualified scribe on kosher parchment, adhering to strict guidelines to ensure its validity.

The significance of the Mezuzah extends beyond its physical form; it serves as a mitzvah, obligating Jewish households to place one on their doorposts to fulfill the commandment of remembering God's words and commandments. The presence of this scroll emphasizes the connection between the individual and their faith, reinforcing the idea that the home is a space of spiritual sanctity.

Other choices do not accurately reflect the definition or role of a Mezuzah within Halacha. For instance, Mezuzahs are not related to food, specific prayers, or marriage rituals. Their unique purpose and spiritual implications distinguish them as an essential element of Jewish observance rather than being confused with other religious items or practices.