Though dry regions may never be as densely populated as those near water, which of the following has led to increased populations in dry areas?

Dry areas were never as crowded as those areas near the waters however, the development of better technologies that allow access to more water supplies has caused the increased population in dry areas. Water is made readily accessible to remote and dry areas due to current developments in science.

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].