The urinary or the excretion system.
The answer is D. Cattle have microbes in their stomach that produce methane during digestion
<span>Additive color is color created by mixing a number of different light colors, with Red, green, and blue being the primary colors normally used in additive color system.</span>
D, because if you burn fossil fuel the smoke while burning the fossil fuel is carbon dioxide and we live off fossil fuel and that means we use a lot of fossil fuel.