What is true about normal bowel movements?

Normal bowel movements typically present as well-formed, brown, and soft stools. This description is considered the standard for healthy bowel function. The brown color is primarily due to bile pigments resulting from the digestion of food in the intestines, and the softness and form ensure that stools are able to pass easily without straining.

While it's true that stool color can vary based on diet and other factors, the essential characteristic of normal stool is that it should not be overly hard or difficult to pass. This is indicative of healthy hydration and dietary fiber intake, aiding in digestion and regularity.

The option suggesting that stools are primarily liquid describes diarrhea, which is not characteristic of normal bowel movements. Furthermore, while variations in stool color can occur due to certain foods or medications, the fundamental measure of normalcy is based on the typical consistency and color described in the correct response. Lastly, the assertion that stools should be hard indicates constipation, which is not desirable for regular bowel health.