Final answer:
Moira's development of fat tissue in her breasts, a defined waist, and growth of hair in her armpits and genital area are examples of secondary sexual characteristics that occur during puberty due to the influence of sex hormones.
Step-by-step explanation:
As Moira enters puberty, her body is undergoing several changes, which are all examples of the development of secondary sexual characteristics. These changes include the development of fat tissue in her breasts, a greater definition of her waist, and the growth of hair in her armpits and around her genitals. During puberty, adolescents experience a period of rapid body growth, and sex hormones like estrogen in females contribute to the development of feminine traits such as breast growth and the deposition of fat mainly in the breasts and hips. The broadening of the pelvis and the growth of axillary and pubic hair are also typical developments during this time.
The sequence of pubertal changes is relatively consistent, beginning with breast development and followed by the appearance of pubic and axillary hair. The physical changes of puberty are due to the maturing of the adrenal glands and sex glands, a process referred to as adrenarche and gonadarche, respectively. These changes in the body reflect the body's development towards reproductive maturity.