Scientists are monitoring the pH of oceans. Which of these are they most likely studying? A. the population of polar bears
B. the health of coral colonies
C. the level of carbon dioxide in the air
D. the rise of sea level

B. the health of coral colonies

Explanation:

C. the level of carbon dioxide in the air

Explanation:

answer; ///i believe the answer your looking for is (ribosomes);

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)