Answer:
Mechanical barriers are devices that provide a physical barrier between the sperm and the egg. Examples of mechanical barriers include the male condom, female condom, diaphragm, cervical cap, and sponge. The condom is the only contraceptive method that helps prevent sexually transmitted infections (STIs).
Get vaccinated so you are protected.
Wash your hands A LOT to minimize your chances of exposure.
Cough into your elbow so you don't spread germs.
B- Otic, Nasal, Topical, Oral, Injection & Organic
Its been 4 years since i've taken this class but I think its not all the above. The best answer in my eyes would be that the muscles around them become stronger. Hope this helped.
