What is the best description of health protection?

Health protection is a wide range set of activities being imposed by the government agencies for the benefit of the people. Its goal is to prevent diseases, provide advices and protect the people from environmental threats. They involve in safety and quality of the human necessities, prevent transmission of communicable diseases and minimize the outbreaks that may harm the public health.

Aand b would both be correct

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.