Question

menopause refers to 1) the cessation of menstruation. 2) the loss of male sexual potency. 3) irregular timing of menstrual periods. 4) the loss of sexual interest in late adulthood.

Explanation:

Menopause in women is defined as the cessation of menstruation. It is a natural biological process that marks the end of the reproductive years. The other options are incorrect as menopause is specific to female - related menstrual changes and not about male sexual potency, irregular timing of menstrual periods (which can be a pre - menopausal symptom but not the definition of menopause), or loss of sexual interest in late adulthood.

Answer:

1. the cessation of menstruation.