If you’re doing ck-12 just put f and you’ll get it right

...ok

Explanation:

ight ok i guess f

air quality

poor drinking water

and heavy polution

can lead to poor health

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.