Which of the following is a typical cause of constipation?

Dehydration is a typical cause of constipation because adequate hydration is essential for maintaining the proper functioning of the digestive system. Water is necessary for softening stool and helping it move smoothly through the intestines. When the body is dehydrated, it absorbs more water from the food and waste material in the intestines, leading to harder and drier stools that are more difficult to pass. This can result in infrequent bowel movements and discomfort, which are indicative of constipation.

In contrast, a diet high in fiber typically helps to prevent constipation by adding bulk to the stool and promoting regular bowel movements. Excess physical activity is usually associated with improved digestive health and can help stimulate bowel function. High fluid intake, particularly when combined with fiber, supports healthy digestion and helps to keep stools soft and manageable. Therefore, these other options tend to alleviate rather than cause constipation.