Final answer:
Most girls first begin to show growth of breasts and pubic hair between the ages of 10 and 14.
Step-by-step explanation:
During puberty, most girls first begin to show growth of breasts and pubic hair between the ages of 10 and 14. The development of breasts is usually the first visible change, followed by the growth of axillary and pubic hair. The stages of puberty typically begin around age 10 and are completed by about age 14.