Final answer:
Sati is the act of self-immolation by a widow after her husband's death. Guru Amardas Ji opposed this practice. The widow would choose to burn herself alive as a way to honor her husband or she might be pressured to do so by the husband's family.
Step-by-step explanation:
Sati is the act of self-immolation by a widow following her husband's death. It was a Hindu practice that arose after 500 CE and was primarily carried out by aristocratic Hindu warrior families. The widow would choose to burn herself alive as a way to honor her husband or she might be pressured to do so by the husband's family. Despite opposition to the practice, it continued among many pious Hindus. Guru Amardas Ji, a prominent figure in Sikhism, opposed the practice of Sati.