Final answer:
Fecal impaction is the condition where a mass of stool blocks the colon due to colon contractions being unable to move it, which is an extreme form of constipation.
Step-by-step explanation:
The answer to the question is option c. Fecal impaction. Fecal impaction occurs when a mass of stool becomes stuck in the colon and cannot be moved by colon contractions. The mass of stool that cannot be moved by colon contractions, resulting in a blocked colon, is known as fecal impaction. This condition is an extreme form of constipation where dry, hard stools collect in the rectum and can’t be expelled. In contrast, diarrhea occurs when insufficient water is absorbed from waste in the intestines. Understanding the process of digestion, including how mechanical digestion and peristalsis in the large intestine function, is important for recognizing these conditions. A regular diet, hydration, and stress management are key components in maintaining healthy bowel movements.