Ill mark you brainlisrst​

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

i think   the answer is c hope i'm right