Final answer:
When a primate's energy expenditure rises above the basal metabolic rate (BMR)
Step-by-step explanation:
The basal metabolic rate (BMR) is the amount of daily energy expended by humans at rest. It measures how much energy the body needs for normal, basic, daily activity. When a primate's energy expenditure rises above the BMR, it typically occurs during physical activity or when the body needs to regulate its temperature. For example, when a primate is engaging in vigorous exercise or is exposed to cold temperatures, the energy expenditure will exceed the BMR.