How many years passed from the start of world war 1 to u. S. Entry?

More than two and a half years, is the right answer.

Explanation:

The First World War began in the year 1914 in Europe. As many of the Americans wanted to stay out of the conflict so they supported the policy of strict and impartial neutrality announced by Woodrow Wilson, the then President of the United States. However, the United States engaged in the war due to the German policy of waging unlimited submarine warfare which resulted in the sinking of American ships. The Zimmerman Telegram was the recent cause of America's entry in the war.

"the importance of the japanese economy and security is far greater than that of the asian values"

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.