What is the anthropomorphic sentence of mountain fog?

The text "Mountain Fog" was written in an anthropomorphic way. The anthropomorphic sentence in the article is: Mountain fog is like a group of playful children, who like to run in the valley early in the morning, then run from the foot of the mountain to the mountain and then get into the dense forest. Are they chasing and frolicking or playing hide-and-seek in the forest? Grandpa Sun stood up and showed a red smiling face. Gradually, the mountain fog disappeared. Are they tired of running and resting quietly in the forest, or are they hiding in the grass and turning into crystal dew, secretly watching the passing children smile?