Final answer:
Hormonal contraceptives inhibit ovulation by suppressing FSH and LH production, preventing the release of an egg. They also alter the cervical mucus and uterine lining to hinder sperm fertilization and embryo implantation.
Step-by-step explanation:
The key aspect of hormonal contraceptives is B) Inhibiting Ovulation. These contraceptives work primarily by suppressing the production of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland. When these hormones are suppressed, ovulation—the release of an egg from the ovaries—is prevented. This is the biological basis of hormonal birth control pills, which contain hormones such as estrogen and/or progesterone.
Additionally, these contraceptives make changes in the cervical mucus and the lining of the uterus, which further prevent pregnancy by making it more difficult for sperm to reach and fertilize an egg and for an embryo to implant.