Sprain has to do with the ligaments (torn ligaments) while strain has to do with an over-worked or over-stretched muscle
Additionally, individuals who are in periods of growth, such as pregnant women and teenagers.
The left side of your heart pumps oxygenated blood to your body.
The right side pumps blood to the lungs to receive the oxygen and it goes out of the left side to distribute it throughout the body.
Hope this helps! If you have any questions, just ask!
The answer is B.) public service announcement.
Because A.) advocate: is the one giving the announcement. (wrong)
C.) smoking law: this is not a law: but a warning, and could have nothing to do with smoke. (wrong)
D.) medical advancement : Is when technology in the medical field becomes more efficient, Not a message. (wrong)
Good Luck! :)