Answer:
Emphysema ;A condition often caused by smoking,
Bronchitis ; The inflammation of bronchioles in the lungs
Asthma ; A condition in which an attack can trigger
Pneumonia ; The build up of fluid in the alveoli of the lungs
Explanation:
I hope it helps :)
This is false!
Carbon is found in many substances!
For example, we breathe out carbon (Carbon dioxide) and as a result, there is an amoung of carbon in the air.
Carbon is also found in many rock types, such as in coal.
Because if we're simultaneously moving/manipulating two different variables it can be very hard to determine why one variable is changing and why the other is changing. While this can be done with more complicated experimental designs, it usually is the case that scientists will only manipulate one variable and not two different ones.
