Which factor determine weather patterns across south america?

a.) forest canopies
b.) elevation
c.) river basins
d.) global warming

One of the factors that determine the weather patterns across South America is its geography. Among the reasons falling in this category is the elevation. Thus, the answer is letter B. The weather becomes colder as the altitude increase. 

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 primary waves;