I would go with C because people can also cause land pollution
Answer:
smoke inhaled involuntarily from tobacco being smoked by others.
Explanation:
Answer:
Forms of passage of substances across the blood–brain barrier. (A) Passive diffusion: fat-soluble substances dissolve in the cell membrane and cross the barrier (e.g., alcohol, nicotine and caffeine). Water-soluble substances such as penicillin have difficulty in getting through.
I would say it's option "A."
