Where does the life in the forest start

I would think migration, or evolution to a new species to adapt to the rain forest, temperate forest, or a climate temperate forest.

Explanation:

the aswer is letter c

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.