Have you noticed a lump in the middle of your throat growing during puberty? This is known as your Adam's apple, and if you want to feel it, you can take three fingers and put it on your middle of your throat and start to talk. When you feel something moving up and down and a little bit of vibrations, you've located your voice box, which is protected by growing cartilage, which forms your Adam's apple.
This is more prominent in boys usually, but girls can experience it too. You may notice it, and you may not. The cartilage actually grows during puberty when the hormones get released in your body and start to trigger changes of growth. Sometimes it triggers the change of growth in the cartilage in your throat that protect your vocal cords and your voice box. This can form an Adam's apple, and it's totally normal. You may notice it, you may not. You may pay attention to it, you may not. It's all part of the normal process of puberty, and it's there really to protect your vocal cords.