The given options are related to the actions performed during Hajj (Islamic pilgrimage). "Twafu al-Ka'bah" refers to the act of circumambulating the Ka'bah, which is an essential ritual of Hajj. It involves walking around the Ka'bah seven times in a counterclockwise direction. The other options mentioned, such as Zakat (charity), fasting, and prayer, are also important acts of worship in Islam but are not specifically related to the actions performed during Hajj. Therefore, the correct answer is "Twafu al-Ka'bah."