In order to grow your cells need to expand and divide in order for your body to grow.
Answer:
reproduction
I am typing this part because it wouldn't let me submit because I didn't have enough written
Adaptations in humans can be physiological, genetic, or cultural, which allow people to live in a wide variety of climates. There has been a great deal of research done on developmental adjustment, acclimatization, and cultural practices, but less research on genetic adaptations to cold and heat temperatures.
