What has led to the vast variation seen in flowers?
a. temperature
c. pollinator attraction
b. breeding
d. sexual selection

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.

1.the evidene of the reaction

2.yes

3.yes