The mythical tree where the ten suns rested is called Fusang.
In Chinese mythology, Fusang is a divine tree located in the far east, the direction associated with sunrise. The ten suns are commonly described as three-legged sun crows living in or resting on this tree. They were supposed to take turns crossing the sky, so that only one sun appeared during the day while the others remained at Fusang.
The myth explains why the world was endangered when all ten suns emerged at once. Their combined heat scorched the earth, dried rivers, and threatened life. The celestial archer Hou Yi was sent to restore order and shot down nine of the ten suns, leaving one to continue its daily journey. Xihe, often described as the mother of the suns and their charioteer, is closely connected with this story.
Fusang is not always treated as only a tree. Ancient Chinese writings also use the name for a distant eastern land or island, and descriptions vary. The tree itself is sometimes identified as a mulberry or hibiscus, but the quiz answer remains Fusang; peach, willow, and cassia belong to other Chinese symbolic or mythic traditions.