Which factor is NOT related to influencing urine volume?

The factor that is not related to influencing urine volume is animal age. While age can affect various physiological functions in animals, such as metabolism and organ efficiency, it does not directly control the volume of urine produced. Urine volume is more influenced by immediate factors such as physical activity, species, and food intake.

Physical activity can impact hydration levels and consequently influence the volume of urine produced, as active animals may lose more fluids through sweat and respiration, thus affecting their urine concentration and output. Different species have varying urinary production norms due to differences in physiology and habitat needs, making species an influential factor in urine volume. Food intake also plays a crucial role, as the type and amount of food consumed can affect hydration and the water content of urine. Conversely, while age can influence renal function and hydration status over time, it is not a direct factor affecting the volume of urine secreted at any given moment.