Which of the following would be considered a bad feature of a pasture?

The absence of shelter in a pasture is indeed a bad feature because adequate shelter is crucial for the well-being of horses. Shelter provides protection from harsh weather conditions such as extreme heat, cold, rain, and wind, which can significantly impact a horse's health and comfort. Horses need places to escape the elements, reduce stress, and avoid injury from severe weather.

In contrast, well-maintained grass, good fencing, and clean water sources are all essential attributes of a pasture that contribute positively to a horse's living conditions. Well-maintained grass ensures that horses have access to nutritious forage, while good fencing helps keep horses safe and secure within the pasture, preventing them from escaping or coming into contact with potential dangers. Clean water sources are vital for hydration and overall health. Hence, while the other features contribute positively to the pasture environment, the absence of shelter represents a significant risk to the horses' safety and comfort.