Why is specialization a common result of free trade? O A. Worker safety agreements encourage production that uses skilled
labor.
B. Loss of import tax revenues forces countries to limit what they
manufacture.
C. Trade agreements determine what each country must produce.
O D. Competition encourages countries to specialize in what they do
best.

Exposed great deposits of coal and iron ore

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].

Tropical climate is experienced in the nothern countries of south america