Why do plants grow on the three toed sloths fur?

Plants grow on three-toed sloths' fur primarily due to the moist, nutrient-rich environment created by the sloth's slow metabolism and their infrequent grooming habits. The fur provides an ideal habitat for algae, fungi, and other small plants, which can benefit from the shade and protection offered by the sloth's body. This symbiotic relationship helps camouflage the sloth in its rainforest habitat and provides a source of nutrients for the plants. Additionally, as the sloth moves through the forest, it aids in the dispersal of these organisms.