Drag each label to the correct location on the image. Match each hormone with its source gland.
estrogen
oxytocin
progesterone
testosterone
growth hormone
thyroid-stimulating hormone

How is the central idea developed further? (a) the author elaborates on the treatments for allergies in adults and how they work. (b) the author quotes the reactions of experts and the methods used to conduct the study. (c) the author compares the different rates of food allergies shown in children and adults. (d) the author indicates the limitations of the study because of differences in health care.