Which is a reason that abstinence is a good idea for teenagers?

Alcohol can damage a still developing a0 and put one in risky situations.

How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels by damaging or changing a cell's dna by increasing heart rate by increasing phlegm and mucous production

Amino acids are important to the body because they build carbohydrates proteins complex carbohydrates simple sugars fats