Which of the following helps to regulate body temperature?

Water plays a crucial role in regulating body temperature in livestock. It is essential for several physiological processes, including thermoregulation. When animals become overheated, they can dissipate heat through processes like sweating and respiration, which require water. The high specific heat capacity of water allows it to absorb and retain heat, stabilizing internal temperatures even when external conditions fluctuate.

In addition to thermal regulation, water is involved in the activities of enzymes and the transport of nutrients, contributing to overall metabolism that also affects temperature balance. Because of these properties, maintaining proper hydration is vital for livestock, particularly in hot environments or during vigorous physical activity, where the risk of overheating increases.

While minerals, carbohydrates, and proteins are all important macronutrients that serve various functions in animal nutrition, they do not directly participate in thermoregulation in the same way water does. Thus, water can be identified as the most significant factor among the choices provided.