Anne is afraid of lightning, but her father tells her that lightning is good for the soil on their farm. how does lightning the soil? the lightning raises the soil temperature. the lightning kills bugs in the soil. the lightning produce oxidized forms of nitrogen such as nitrate. the lightning sanitizes the water in the soil. the lightning makes the soil more acidic.

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.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion