The United States
it would be the freestyle the most easiest stroke in swimming
Frontcrawl is generally the most popular swimming stroke as it is the most efficient
the most popular country is Rome
It is the most popular method by far of sanitising pool water. I woulld say that every country does.
Swimming is easily the most popular water sport in Australia.
Yes Australia is the most popular country
It isn't, Rugby and Football are the main and most popular, swimming might be popular but it isn't the main sport