Answer:
Mental health is important because without it, you wouldn't be able to do the things you want. For example, if i was going through depression, i wouldn't be my normal self, would I?
Explanation:
Hello! :)
I really think it is none of the above since gasoline is really the one that produces the smoke from vehicles such as cars and contributes to air pollution.
Hope this helped!
Good luck!
~ Destiny ^_^
B. physical and mental health
I believe the answer is <u>DIGESTION</u> , I think this because when your food is going through the process of digestion, there is physical and chemical breakdowns of your food, and the nutrients that comes from the food you ate.
Mouth: physical digestion
Stomach: chemical digestion
Small Intestines: helps break down the food more after it absorbs the nutrients from the food into the blood stream
Large Intestines: absorbs the remaining water from the food into the bloodstream/body
Hope this helped :)