<P> The cephalocaudal trend, or cephalocaudal gradient of growth, refers to the pattern of changing spatial proportions over time during growth . One example of this is the gradual change in head size relative to body size during human growth . During prenatal growth, from conception to 5 months, the head grows more than the body . In humans, the head comprises almost 50% of total body length at approximately the third month of intrauterine development . By the time of birth the head has decreased to approximately 30% of total body length as a result of the limbs and trunk growing faster than the head . This trend continues postnatally along an axis of increased growth from the head to the feet . Finally, in adults, the head represents approximately 6% of the body length . The cephalocaudal trend is also the trend of infants learning to use their upper limbs before their lower limbs . The proximodistal trend, on the other hand, is the prenatal growth from 5 months to birth when the fetus grows from the inside of the body outwards . When referring to motor development, the proximodistal trend refers to the development of motor skills from the center of the body outwards . </P>

Which of the following is an example of the cephalo-caudal law of developmental direction