Which process involves treating a body to prevent it from decaying?

The process of treating a body to prevent it from decaying is known as embalming. This technique involves the use of chemicals to temporarily delay the natural decomposition process, allowing for proper presentation of the deceased for viewing and memorial services. Embalming typically incorporates formaldehyde, which acts as a preservative, along with other solutions designed to disinfect and restore a more lifelike appearance to the body.

Cremation, on the other hand, involves the reduction of the body to ashes through intense heat, completely eliminating the need for preservation. Preservation can refer to a broader range of methods, including embalming, but does not specify the chemical treatment specifically. Repatriation is the process of returning a deceased person's remains to their country of origin and does not involve the preservation of the body itself. Thus, embalming is the most accurate term for the treatment process aimed specifically at delaying decay.