What is the average daily energy requirement for infants?

The average daily energy requirement for infants is typically around 1200-1500 kJ per day, depending on their age, weight, and activity level. Infants have high energy needs relative to their size due to the rapid growth and developmental changes occurring during their early months.

Energy requirements can vary, but generally, infants need about 100-120 calories per kilogram of body weight per day, which translates to the lower range of the options given. As infants grow and their activity levels increase, their energy requirements may also rise, but they usually stay within the initial range.

The choice indicating 1800-2000 kJ exceeds the average needs for infants significantly. This overestimation doesn't accurately reflect the energy requirements for the majority of infants, who don't typically reach such high daily energy demands until they become toddlers or older children. The precise determination of energy needs should also consider individual growth patterns, feeding practices, and overall health.