Eat colorful fruits and vegetables, like berries, broccoli, carrots, etc. Don't stare at a screen too close, and take a break every hour. Drink lots of water, and try to look far distance.
A is the answer I've had this question before also on a health work sheet
Answer:
Tendency to have unprotected sex
Lack of sufficient knowledge about HIV transmission
Indulgence in irresponsible sex behaviors, such as sex working
Prevalence of young transgender individuals.
Increased drug usage
Explanation:
I'll assume that the lung volume is 5.30 L. 1L= 1dm 3 5.30dm 3 x ( 1m/ 10 dm )3 x ( 1.5 ug pb / m 3) x ( 1 g pb /1 x 10 6 ug pb ) x ( 1 mole pb /207.2 g pb) x( 6.02 x 10 23 pb atoms / 1 mole pb) =2.3 x 10 13 pb atoms
