Answer:
b) dumping used oil into street drains
Explanation:
C
The respiratory system removes the waste carbon dioxide produced from aerobic respiration in the body.
Lava is at the center of the earth witth lava
In fetal circulation, the ductus venosus bypasses the liver and the ductus arteriousus bypasses the lungs. Ductus arteriosus also called ductus botalli is a blood vessel connecting the main pulmonary artery to the proximal ascending aorta. It does allow most of the blood from right ventricle to bypass the fetus's fluid-filled non-functioning lungs. Ductus venosus on the hand allows oxygenated blood from the placenta to bypass the liver.