Talk about your understanding of "at different heights, there are different forest zones." The sentence is from "The Beautiful and Charming Alishan". Please answer in a simple way.

Alishan has virgin forests from all climate zones on the planet. At the foot of Alishan, there is a tropical forest area, with longan trees, ginger bushes, etc.; on the mountainside, there is a temperate forest area, with bamboo forests, fir forests, etc.; near the top of the mountain, there are cryptomeria, red cypress, and even cold zone needles. type of plants. It is rare to have plants from all climate zones around the world on the same mountain.