Answer:
C. Acquiring HPV
Explanation:
Human papillomavirus (HPV) is the most common sexually transmitted infection (STI).
Many people with HPV don't develop any symptoms but can still infect others through sexual contact. Symptoms may include warts on the genitals or surrounding skin.
There's no cure for the virus and warts may go away on their own. Treatment focuses on removing the warts. A vaccine that prevents the HPV strains most likely to cause genital warts and cervical cancer is recommended for boys and girls.
The smoke in cigarettes have carcinogen chemicals that cause second hand smoke to people who dont smoke and can cause lung problems or even cancer.
Because it is flexible. Think about it; the ribs protect both the lungs and the heart. If the ribs were solid bone all the way around then unless you constantly break your ribs you wouldn't be able to expand the cheat to breath. Additionally your lungs would constrict the heart to a degree that it would function properly.
False, it is through perception though the senses i believe.<span />
