The main process of excretion takes place in the -stomach -kidneys -liver -small intestine i think it's the kidneys, because the others are more relatively digestion. :

The answer that would best complete the given statement above would be the KIDNEYS. Yes, you are right. The main process of excretion takes place in the kidneys. The kidneys filters the blood and this is the one responsible for excreting the waste products in the body in a form of urine. Hope this helps.

Ithink it’s d. that should be correct.