Final answer:
The average age range at which most women enter menopause is between 45 and 55 years old.
Step-by-step explanation:
The average age range at which most women enter menopause is between 45 and 55 years old. Menopause is the cessation of the menstrual cycle that occurs as a result of the loss of ovarian follicles and the hormones that they produce. This natural process marks the end of a woman's reproductive years.