a) Name one way water sources become contaminated (dirty) in 3rd world countries?

i think water becomes dirty is when certain people and animals take i poop on the ground it travels through out the ground and gets into the water we all drink.

b) What are the dangers of water contamination?

to me some dangers are certain diseases like diareah and a lot more.

c) Describe (in your own words) an invention that can save people from drinking contaminated water?

my invention is metal floors so they cant poop on the floor or get it dirty

d) Why do you think everyone in 3rd world countries do not have these inventions?

i think they don't have these inventions because they cant afford it and the don't have the invention yet.