What is the ozone layer, how was it threatened, and what have we done to fix it? be as precise and accurate as possible.

Ozone is a stratospheric layer of three oxygen atoms, this acts as a blanket to earth.

Explanation:

The depletion of ice caps and the release of harmful gases like methane and CFCs in the environment from vehicle exhausts and Air Conditioners produce the same greenhouse environment that hinders the development of this layer and as result, the impact is seen in the form an ozone hole over Antarctica and Arctic circle. The global data released from LANDSAT and MSS satellites show the catastrophic amount of damage that had been done to the ozone by a mix of these gases that break the atomic structures and hence deplete the life on earth. An example of this is coral bleaching and drastic impact t has on marine life as the Ultraviolet rays hat enter the surface damage skin cells and tissues of these small organisms.  Also, associated with the warming of ocean temperature and an increase in salinity, etc.

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

The answer is d) rift