Protein is essential to the overall health of the body because it

a. gives the body collagen, which protects the organs.
b. sustains life and keeps body systems in good repair.
c. "bulk up" muscles.
d. keeps hair and nails healthy.

What is difference between an epidemic and a pandemic? a) an epidemic is a disease; a pandemic is a treatment.b) an epidemic is restricted to a local region; a pandemic is global.c) an epidemic has low mortality; a pandemic has higher mortality.d) an epidemic is caused by a bacterial infection; a pandemic is caused by a viral infection.