Question

what gives our stool its brown color?

Explanation:

The brown color of stool is mainly due to stercobilin. Stercobilin is a breakdown product of bilirubin. Bilirubin is produced from the breakdown of hemoglobin in red - blood cells in the liver. It is excreted into the intestines as bile, and bacteria in the intestines convert it into stercobilin, which gives stool its brown color.

Answer:

Stercobilin