Darwin suggested that evolution occured at a steady, relative slow rate. today scientists cite fossils evidence to support which revision of darwins suggestion

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.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

youre right there are