Which of the following statements best describes the availability of freshwater on earth?

Freshwater is not as common through history. Most oceans on earth are salty, the Great Lakes being an exception. Over time freshwater has been used constantly by humans and declines, their are still tons in the
Various water-tables. Hope that helps

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

The answer to the question is moraine