Answer:
Tobacco can affect the excretory system by causes colorectal cancer.
Explanation:
The exact cause of colorectal cancer is not clear, but certain risk factors, including diet, cigarette, smoking and heavy alcohol consumption and using tobacco are strongly linked to the disease.
Individuals with other genetic cancer syndromes or a family history of colorectal cancer may have a high chance of developing the disease.
I know that B applies, and D might apply assuming it means certain materials can pass through and not all materials can pass through.
Although it is said that marijuana is not good for the body, it is still harmful to the lungs and by smoking it you could potentially put yourself or others in danger. Marijuana dulls the senses almost like alcohol.
The answer should be A, as anorexia nervosa is when someone worries far too much about their weight and begin to eat far less, becoming severely underweight.