Diffusion.
diffusion is passive, and the oxygen and carbon dioxide move to the area of lower concentration
Quackery is the health fraud, which uses fraudulent advertisements and misinterpreted information, medical practices, for the promotion of products. So, in your case, the correct answer is B, i.e., <span>the provider's success claims seem too good to be true. </span>
They will need medical help.
You need to get it every 10 years
