Antarctica would have flora and fauna very different from Sahara - so we can exclude this option. Also, Sahara doesn't have ice sheets - so we can exclude option c too.
The correct answer is d- deserts are usually defined in their relatively low level of precipitation.
the major cause of ozone depletion is chlorofluorocarbons (CFCs) and halons gases formerly found in aerosol spray cans and refrigerants are released into the atmosphere.
have a nice day:)
Convection currents form in atmosphere and freshwater lake. Convection currents occur when there is difference in temperature in both substances (eg. fluids). When there is a difference in temperature, the hot substance rises and the colder one sinks. The flow then will be form a hotter to the colder region.
A) a large fault on Earth's crust
