The state of California experiences periodic occurrences of severe drought conditions. Which weather phenomenon most likely causes this and why? El Niño, because of weakening of trade winds
El Niño, because of strengthening of trade winds
La Niña, because of increased upwelling of cooler waters
La Niña, because of decreased upwelling of cooler waters

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].

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