10 points
Cells in your body get oxygen they need and get rid of carbon dioxide
waste through the? *

A. Digestive System
B. Respiratory System
C. Nervous System
D. Circulatory System

Respiratory System

Explanation:

The respiratory system's primary organ is the lungs which take in oxygen adn expel CO2

chlorophyll a: this is the most abundant pigment in plants. chlorophyll a absorbs light with wavelengths of 430nm(blue) and 662nm(red). it reflects green light strongly so it appears green to us.

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.

: -)