Because the chemicals in them would damage your skin because of the structure of your skin cells.
It's easier to understand the difference when you treat them as separate entities. Mental health is about mental wellness - we all have mental health. Mental illness is when someone is diagnosed with a mental disorder.
Probably spreading depends on the context you probably should add
Answer: <u><em>The child of a smoker</em></u> is at risk from exposure to secondhand smoke.
Explanation:
Many scientific articles have been written based on research done over the years. Many of these articles state that if a person was introduced to second hand smoke before the age of 25, are the ones most likely to get cancer or other respiratory diseases. Many of these people were exposed since birth.