During a growth spurt, which is (are) likely to grow first?

The answer are the hands and feet.  It is the continuously changes of the characteristics of the body, most noticeable in height and weight.  The ages 13-15 and 17-18 the two major brain growth spurts occur. In times of growth spurts the changes is visible during the first year of puberty.

materials water oxygen those are the things i can think of in this moment.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.