Stench refers to a strong, unpleasant smell that can be offensive to the senses. It often arises from decaying organic matter, waste, or certain chemicals. Common sources of stench include garbage, spoiled food, and sewage. The intensity of a stench can vary, but it typically evokes a negative reaction from those who encounter it. The perception of stench is closely linked to the sense of smell, which is one of the five human senses. Certain animals, like dogs, have a heightened ability to detect stench, making them useful in search and rescue operations or in detecting drugs and explosives.