Smoking cigarettes can harm smokers by: a. causing cavities b. killing a smoker prematurely c. causing infertility d. all of the above

Which type of food have a high amount of nutrients relative to the number of calories

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

The future for teen moms can be compromised due to the demands of parenting.