Final answer:
Barrier methods of birth control include the diaphragm, condoms, and the cervical cap. These methods physically block sperm from entering the uterus, preventing pregnancy. Condoms also provide protection against sexually transmitted infections.
Step-by-step explanation:
Barrier methods include the diaphragm, condoms, and the cervical cap. These methods work by physically blocking sperm from entering the uterus, thus preventing fertilization. Diaphragms are inserted vaginally before sexual intercourse and cover the cervix to be effective. Condoms are the most commonly used barrier method and can also prevent the spread of sexually transmitted infections.