The purification performed in the absence of water is?

The purification performed in the absence of water is called "Tayammum". Tayammum is a ritual purification method used in Islam when water is not available or its use may cause harm. It involves using clean earth or dust to cleanse oneself before prayer or other religious activities. To perform tayammum, a person must strike the earth with their hands and then wipe their face and hands with the dust. The process is done with the intention of purifying oneself and seeking closeness to God. Tayammum is a practical solution for Muslims who may find themselves in a situation where water is scarce or unavailable, such as when traveling or in a desert environment. It allows them to maintain their purity and perform their religious duties.