Can a 12 year get muscular and build muscle mass if they haven't hit puberty can they reach they’re full potential when working also can you add how they know if they are going through puberty

Which of the following summarizes the role of the hypothalamus? it connects the endocrine and nervous systems and controls the pituitary gland. it controls the rate at which cells burn fuels from food to produce energy. it produces glucagon and insulin to control glucose levels in the blood. it releases adrenaline as a response to fear, stress, and excitement.