Which of the following statements best assesses the significance of the minamata disaster?
a.
it was the largest oil spill to occur before the year 2000.
b.
it was the first case of air pollution ever recorded in japan.
c.
it was the largest release of nuclear radiation ever recorded.
d.
it was the first officially recognized case of the industrial pollution of seawater.

The answer is D, It was the first officially recognized case of the industrial pollution of seawater. They were dumping mercury in the water.

Here is a picture  of the net. its 4 squares in a row diagonal and on the third draw one square aove and under

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].