Which statements describe the geographic theme of regions? Different types of regions have little or no effect upon each other.

Climate regions are defined by their average temperature and their political system.

Physical regions can be formed by mountains and oceans.

Cultural regions are limited to specific countries.

Nations that are members of an economic region enjoy fewer tariffs than non-members

Regions share one or more common characteristics.

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].

Answer your driving test ;

Answerbecause of improved transportation, communication, and other advantages;

Answer the use of flood plains and irrigation;