Rocks and minerals were cataloged around 200 bce by
a. the greeks
b. the japanese
c. the romans
d. the babylonians

Rocks and minerals were cataloged around 200 BCE by the Greeks. The correct option among all the options that are given in the question is the first option or option "a". Greeks were one of the most civilized and modern thinkers during that time. They were the native inhabitants of the country of Greece. 

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].