Answer:Tumors can be benign (noncancerous) or malignant (cancerous). Benign tumors tend to grow slowly and do not spread. Malignant tumors can grow rapidly, invade and destroy nearby normal tissues, and spread throughout the body.
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B. Adolescents need more calories and nutrients, especially if they are very inactive.
I think they say that because most younger teens havent been driving as long as older people. And some might text and drive, or not pay attenntion. But i disagree because i have seeen how older people drive and it scares me...