What usually happens to an ecosystem after a sudden catastrophic change? Please answer quickly

Explanation:

What occurs is ecological succession. When an entire ecosystem is suddenly changed due to a catastrophic scenario it gets replaced by another. Other plants or animals replace the ones that got wiped out in an event such as a big forest fire or flood. Only if the place of the catastrophe somehow becomes uninhabitable another ecosystem won't come out of the old one.

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 its the first one